Long overdue review but it will be short. I do love their food and especially their smoothie drink with boba. Service is pretty quick. read more

I've been ordering from O2 Cupertino since they first opened many years ago, and their food has consistently been great. Normally, pickup orders are pretty fast, usually ready in less than 20 minutes. Unfortunately, today's experience was quite different. It took a total of 59 minutes to get my order. I arrived at the restaurant at the pickup time stated in their confirmation, only to wait another 30 minutes inside before my food was finally ready. I still enjoy their food and will continue to order from them, but today's experience was frustrating. A word of caution: If you're short on time, you might want to avoid ordering during the busy lunch rush, as the estimated pickup time may not be reliable. read more

I decided to try out O2 Valley due to the great reviews. I was not disappointed! As others have said, the portions are large. If you're really, really hungry, you might be able to finish it but that would be impressive. I ordered the Five Flavor Pork Chop Bento with mild spiciness. The pork chop was pounded *very* thinly. It wasn't oily and the batter was nicely flavored. That sauce was really, really good. For mild, it was pretty spicy. I can handle moderate spice so it wasn't an issue but it can be an issue for those sensitive to spicy heat. It came with scrambled egg with tomato and a cabbage side. Both of those side were a bit under seasoned - unless it was because the sauce+pork chop combination was very seasoned. It was a Monday and I ordered take out. Their app said it would take 16 minutes but I got a text 10 minutes later saying it was ready. When I arrived, there were only 2 tables occupied so it looks like it was a slow. As the terminator said, "I'll be back." Well maybe "I'll definitely be back." read more

O2 Valley - R11 Five Flavour Pork Chop Bento - Bubble Tea Near Me - Cupertino, California

Brought my cousins from SF here for a quick lunch as they don't have very many (if any) Taiwanese food places as most of the places in the city is Cantonese style food. O2 did NOT disappoint. Huge hit! Loved the huge portions and delicious mains as well as the traditional sides with the egg. We got the fried chicken cutlet and the fried squid (5 spice). We also got their mango and peach yogurt smoothie and lychee tea which went perfectly with each of our boxes. We decided to eat there and it was a little confusing given my cousins and I ordered pretty much the same thing so it was double - and they got a bit confused on the orders. BUT they addressed it right away and we were able to get our chicken bentos shortly after. First the fried chicken cutlets is so crunchy, flavorful and PLENTIFUL. Got to bring half back to finish it at dinner!! Actually the same goes with the fried squid. Everything was so delicious. The sauce that came with the squid was a bit spicy but luckily it's tasty even without!! Love Love LOVE O2 and from the crowd I think that's shared opinion. This is my go to for a quick meal and typically for to go but eating in was great as well.... read more

O2 Valley - Fried squid bento (5 spice) - Bubble Tea Near Me - Cupertino, California

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If you're ever in the mood for a quick and delicious meal then I recommend this place! They have several bento options with katsu pork to chicken, popcorn chicken and even popcorn chicken curry! Super flavorful and super quick to order/eat. I ordered the garlic popcorn chicken plus the popcorn chicken curry bento set. First of all, I ordered and within 5 minutes it was ready. Super fast and fresh! This was so delicious, chicken was well prepared, flavorful, and the curry had a nice kick to it. However, the garlic popcorn chicken wasn't as garlic forward as I expected since I saw so many garlic chunks. Next time I'd come back for the curry bento set or the full bento sets for lunch. Def worth the money! Food: 4/5! Can be a bit more garlic fwd but other than that it was great! Service: 5/5 super friendly staff, quick to order via online or kiosk. Interior/Ambiance: 4/5 not too big but has 6 tables for party of 4! there's a self serve sauce bar and water Parking: 3/5 honestly so tight but I found parking pretty easily at 6 pm on a Friday read more

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I've been coming here for years, and it's still my favorite spot for popcorn chicken! Parking in the front can be limited, but there are usually plenty of spaces in the lot behind the building. It's a very casual eatery where you order at a kiosk for takeout or scan the QR code at your table for dine-in, and they'll bring the food out to you. Service is minimal, but they're pretty efficient. Every time I've been, there are always people dining in, and it gets especially busy around lunch. On my most recent visit at 12:30 PM on a Friday, the tables filled up quickly. My meal came out in about 15 minutes, which wasn't bad considering how many people were waiting. The bentos are huge! I can easily split one with someone and still be full. My go-to is the popcorn chicken bento, and it never disappoints. The chicken is crispy with a satisfying crunch while staying juicy inside. I also like that it comes with two side dishes that frequently change, so each visit feels a little different. They're usually vegetables, egg, or another rotating side. Most recently, I got a side of sweet and sour pork. The rice is topped with savory minced pork that adds flavor, and it comes with a boiled egg as well. The chicken pairs well with Thai sweet chili sauce, but don't skip the super hot mushroom sauce. It's not actually that spicy, but it adds the perfect kick. I keep forgetting to buy a jar to take home. I was stuffed, and it looked like I had barely made a dent in my bento. If you're in the area, this spot is an absolute must-try. It's consistently delicious, and one I always come back to! read more

O2 Valley - Delicious dinner for 2! Even had leftovers. | #R4 Popcorn Chicken Bento - Bubble Tea Near Me - Cupertino, California

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I stopped by around noon for a quick lunch and managed to grab a table before the lunchtime rush hit. I ordered the popcorn chicken bento box along with a rose Earl Grey milk tea. The milk tea was overwhelmingly sweet, it's almost like drinking sugar water so I couldn't finish it and ended up throwing it away. The popcorn chicken itself was decent, but the sides lacked flavor. The portion of rice was quite generous, so I had leftovers. Overall, the portion size was good for the price, but it's not something I'd order again. read more

O2 Valley - Popcorn chicken bento & rose earl grey milk tea - Bubble Tea Near Me - Cupertino, California

Omg the food here is so good! I got the braised pork chop bento and my friend got the grilled chicken bites bento and both were so good! I really like the side dishes too! The portion was quite generous and I was full afterwards. There are tons of options on the menu so deciding what to eat took a while for me (laughs). Service was quick and clean interior. Overall, I can't wait to return whenever I'm in the mood for good Taiwanese food! read more

O2 Valley - Braised pork chop bento - Bubble Tea Near Me - Cupertino, California

This place's food reminds me of the Taiwanese bento boxes I grew up eating! Cannot recommend O2 Valley enough - delicious food, huge portions, and a variety of options. I visited on a Saturday afternoon, and it was quite busy. After 1pm, however, the crowd started to clear. The interior is minimally decorated, and there's a fair amount of seating. The bento boxes were the star of the show! I can't get over how much food was in a single bento box - one bento could easily last you two meals. The popcorn chicken was fried to perfection and covered in fragrant spices. The accompanying sides were also delicious! I really enjoyed the grilled chicken. It honestly seemed more fried than grilled, but it was tasty nonetheless. The grilled chicken portion was somehow even bigger than that of the popcorn chicken. There were two huge pieces of grilled chicken, all covered in a sweet and tangy marinade. The golden kimchi paired well with the bentos and cut through the richness of the meat. I've heard great things about the drinks here as well but didn't get a chance to try. Just another reason to visit again! If you're looking for comfort Taiwanese food, O2 Valley is the perfect place for you! read more

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O2 is probably my favorite Taiwanese fried chicken cutlet that I have ever had, maybe O2 even beats Taiwan! I always get the Chicken Cutlet here and really recommend getting the À la carte version since they give SO much chicken!!! Chicken Cutlet - The chicken is always so crispy and flavorful here. The white pepper flavor with salt is an iconic Taiwanese fried chicken taste, and O2 does it so well. The bento is pretty good too and huge! It comes with vegetables, rice with minced pork, and some noodles. You WILL have leftovers! I definitely recommend coming to O2 if you are visiting the Bay Area, the chicken cutlet is a must! read more

O2 Valley - Chicken Cutlet Bento - Bubble Tea Near Me - Cupertino, California

Wait. What?! I haven't reviewed this place yet? This is super common go-to for us. The portions are generous and we love the rotation of sides that come with the bentos. You never know what it is that day and it's like a game for us to see what we get. Our favorite is the tomato egg side but I am never disappointed by any of them. Our hands down favorite is the grilled chicken cutlet bento. I suppose grilled is a little misleading, it has a light crisp to it and it's marinated in some sort of tangy slightly spicy sauce. Sometimes I get an extra side of grilled chicken so baby bear can get extra protein. It's never too much; leftovers the next day go into waffles in the morning for a fusion-y brunch :) If we are feeling extra hungry, we'll add a garlic popcorn chicken side too. Dining in is also an easy casual option. You order directly through the QR code at the table and the food comes out pretty quickly. Toppings, utensils, water are on the side that you help yourself too. If you're good with that service model, it's fast and easy too. read more

O2 Valley - Grilled Chicken Cutlet Bento (so yummy!) - Bubble Tea Near Me - Cupertino, California

I forever love getting their bentos. I like how the sides always change and there's always a different side to try each time I get it. The portions for the sides are always filled to the brim. This was my first time getting the eel bento from here so I was a little disappointed on how there's only two pieces of eel for $19.68. read more

O2 Valley - Bubble Tea Near Me - Cupertino, California

I wish I had tried this place sooner! This is some very legit and addictive Taiwanese comfort food. We tried a variety of dishes and they were all great. There's also a very generous amount of food, I would say that each bento can be 2 meals or for one very hungry person. In addition to the main meats, each bento comes with a lot of rice, sides, and veggies. All the fried foods were fried to perfection. Quick and easy online ordering system for takeout or delivery. Would definitely recommend this spot to anyone craving Taiwanese snack food classics. read more

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Favorite Taiwanese bento box! Amazing fried chicken here. Small restaurant in tight plaza with parking all around. They have tea here as well but stuck to my usually spicy grilled chicken bento box. The spicy grilled chicken bento has a small kick to it with sauce marinated around it. It has a light crispy batter around it so not sure why it's called grilled. Comes with rice, boiled egg, and 2 sides. Have had different sides on different days. Popcorn chicken with garlic was great and has loads of garlic. Plenty of fresh garlic to make your mouth smell right after. Nice staff. Order takes about 10-15 minutes and perfect for to go. Quick and easy lunch with huge portion. read more

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Ordered through qr code and everything came out super fast! All the fried foods were done perfectly. Extra crispy on the outside but still moist on the inside. They have a good variety of bento boxes/ combos and a la carte. Price was pretty good for the portions! We dined in and luckily snagged the last table but take out would be a great option too! read more

O2 Valley - Bubble Tea Near Me - Cupertino, California

When I bit into my first O2 Valley popcorn chicken, I was amazed by how juicy the meat was given how crispy the exterior was. The chicken katsu in the bento was equally succulent. Paired with garlicky broccoli, braised egg, and a generous portion of rice, the food was amazing given the price point. One bento could likely feed two people - that's called a great deal. The interior of the store had relaxing plant motifs, including a mossy panel on the wall. Why the store is called O2 Valley is not clear to me but the refreshing, nature-y aesthetic was very relaxing to dine in. Most importantly, the service was super nice :') Idk the cashier just genuinely wanted to help, offering to show pictures of the food, bringing extra bowls to the table, etc. He seemed like a good boy pat pat. read more

O2 Valley - Popcorn chicken with Basil - Bubble Tea Near Me - Cupertino, California

It is probably one of the best Taiwanese bento places in the south bay. Even their milk tea products were well made and of high quality. Dropped by recently to have early dinner. The food was scrumptious. Pork belly was soft and well cooked, fried pork with curry was crispy and freshly prepared, vegetable side dishes were quite appetizing. Everything was done right and on point. Milk tea was yummy and not overpoweringly sweet. Staff were cheerful, helpful and polite. We enjoyed our time there and will return to try other dishes. read more

O2 Valley - Fried sticky rice balls - Bubble Tea Near Me - Cupertino, California

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I've lived nearby for a long time and never stopped in. They're located in a small plaza with not too much parking. I typically just walk to this plaza. It's a pretty cozy shop. There's a good amount of seating inside. You seat yourself and order by QR code. Water, utensils, and condiments are also self serve. I'm sure you could probably order at the counter as well but I've never done it. We got a minced pork bento and a stir fry basil chicken bento. The chicken bento was pretty spicy, I liked it. The chicken was cooked very nicely and you get two sides and an egg as well as rice with minced pork. The minced pork bento comes rice, egg, and two sides. The staff brought our food to our tables for us. They come in convenient bento boxes and you can ask for lids and bags at the front should you need them. The portions are pretty generous. I ate maybe a third of mine. My partner finished his bento. Depends on your appetite. This is a great place when you just want some comfort food at a no frills mom and pop shop. They're not a big chain and are locally owned! read more

O2 Valley - Minced pork bento - Bubble Tea Near Me - Cupertino, California

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While I was in San Jose, a friend of mine suggested a Taiwanese bento place that I could check out since he was a big fan of it. I decided to order it on Uber Eats since I wanted to try it for lunch that day, and it was delivered fairly quickly with no hassle. I decided to try out the grilled chicken cutlet bento, since people online said it was better than the regular fried chicken cutlet since it's first fried and then grilled with additional sauces added. The portions of it are pretty sizable, and I was a big fan of the sauce along with the crispiness of the chicken. The meat was quite tender as well, while the sides were good as well. I decided to get their milk tea too, which also was pretty solid. Overall, I would definitely order from here again and I can see why my friend recommended it! read more

O2 Valley - Grilled Chicken Cutlet Bento - Bubble Tea Near Me - Cupertino, California

I came here for lunch and got their Braised Pork Chop Bento 滷排骨便當. I was surprised with how many pieces of pork chop they gave, 5 pieces! The portion size for the bento is good, enough for 2 meals for me. The rice had a braised pork, then came with a seasoned soy sauce egg, and two sides. The sides vary - this time I got cabbage and carrots stir fried, and some type of meatball (pork ball) and celery mix. Overall, food came out within 5 mins of ordering. Everything was very quick and delicious. Parking can be a bit difficult but they have some parking at the back of the building. read more

O2 Valley - #R6 Braised Pork Chop Bento (Boneless) 滷排骨便當 - Bubble Tea Near Me - Cupertino, California

I came here twice, and here is my experience: 1. Ambience (4/5): The restaurant isn't too big but has plenty of seating. It's very clean and well-organized. 2. Service (4/5): I mostly served myself because there was only one worker handling both the cashier and server duties in the front. The lady in the kitchen brought the food to my table when it was ready. The guy at the counter was very helpful and nice when I asked him some questions about my food. 3. Food (4/5): - Grilled Cutlet Chicken with Rice (4/5): I thought it would be grilled chicken, but it was actually a big piece of fried chicken with a crispy coating. It was still delicious with the rice. The chicken had a crispy crust and was topped with sauce. I was very surprised by the huge portion, it could easily feed two people! I think the owner focuses on food quality and portion size, which might be why there are only a few workers. The bento box also came with a side of stir-fried vegetables and some braised pork. - Curry Rice with Fried Chicken (4/5): It came with the same fried chicken. The curry sauce was flavorful and pretty good. I'm not usually a fan of curry, but this one was fine for me. Overall: Service was quick and mostly self-served. The food was affordable with huge portions. Everything tasted flavorful and delicious. I'll definitely come back soon!!! read more

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Tried O2 Valley and really enjoyed it! I had their garlic popcorn chicken and loved how much garlic they put on it. So crispy and flavorful and it really hit the spot. I also liked that you can serve yourself dipping sauces which makes it fun to mix and match. It is a nice place to chill and hang out. For drinks I got the mango yogurt which was creamy and sweet and the jasmine milk tea was tea forward which I love. Definitely a solid spot for good bites and drinks. read more

O2 Valley - #A4 Garlic Popcorn Chicken - Bubble Tea Near Me - Cupertino, California

First visit here and this place is da bomb!!! Self order and prepay from the table, and the food came out (not joking) in like a minute. I got the popcorn chicken bento and for around $17 the portions were huge!! The side dishes (veggies and noodles) were sooo yummy and I really enjoyed this no frills dining experience with amazing food :) read more

O2 Valley - #R4 Popcorn Chicken Bento 鹹酥雞便當 - Bubble Tea Near Me - Cupertino, California

Great portions, great vibes. Food was flavorful, the crispy stuff was crispy but still juicy. Pork belly was a bit dry and lean. Overall super solid eats. W Josh for the rec. read more

O2 Valley - Bubble Tea Near Me - Cupertino, California

I appreciate that they have vegetarian options, but I wish they were executed better. When you compare the veg and the non-veg bento, they flip which compartment they put the rice vs the protein. Veg has significantly more rice and less protein because of that. Also, they side dishes vary depending on the day, but sometimes veg bentos get different sides if there's meat in what they prepare. A lot of the times one of the sides is one piece of sushi and a small egg roll which makes the whole meal very carb heavy. One time I ordered three cup tofu and my sides were tomato egg and 豆乾 (pressed tofu), so I felt like my meal very much lacked variety. I hope they consider this more in the future and try to include vegetables and less carbs. Other than the bento, I've also had their oyster mushroom curry and sesame cold noodles (removed the meat). I quite enjoyed the cold noodles, but I wasn't a huge fan of the curry. The mushrooms were soggy and the breading became a gummy like texture. Curry was very average. Their golden kimchi is pretty good but I wouldn't be able to eat a lot of once because the taste is pretty strong. I've also had their sweet potato balls which I think is worth a try if you've never had them before. However, they're more dense than I'd expect. Mushroom curry: 2/5 Three cup tofu bento: 2/5 Sesame cold noodles: 4/5 Sweet potato balls: 4/5 I have a lot to say but I have ordered here quite a few times because my family enjoys it here. Overall, maybe go somewhere else if you're vegetarian. But if you're missing taiwanese street food, go for some of the fried appetizers. read more

O2 Valley - Bubble Tea Near Me - Cupertino, California

Great quick-eat spot in Cupertino and right next to Main Street. The bento boxes are pretty large portions so definitely worth the price. Authentic Taiwanese food and all the sides in the bento go well with the main dish. Easy ordering with the QR code and very quick service. Restaurant has a laid back vibe, great for casual hangouts read more

O2 Valley - Thai basil chicken bento - Bubble Tea Near Me - Cupertino, California

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Food was great and very tasty with large portions. Service was fast. Definitely will be back.

During a recent visit to Santana Row, my wife and I stopped by O2 Valley beforehand to grab a quick lunch. We showed up roughly 30 minutes after they had opened and as expected, the restaurant was very empty. Ordering is done via the QR code on the table or in person at the register. Between the two of us, we shared a chicken cutlet bento and a side of Taiwanese sausage. Food here is quick to come out of the kitchen. After we ordered, it was no more than 10 minutes before we had received our food. Biting into the chicken cutlet, I was instantly transported back to Taiwan. The fried chicken here is on par with some of the best ones that I've had at a Taiwanese night market. The outside breading has the perfect texture, the seasoning is fantastic, and the chicken itself is super moist and tender. All without tasting oily. If you want to add more spice, there's additional popcorn chicken seasoning on the table you can add to your heart's content. The Taiwanese sausage was sweet and savory, and I liked the raw sliced garlic pieces that are served with it. I wish they had plastic knives available at the table, as it was hard to split the sausage otherwise. If you want an authentic Taiwanese bento, O2 Valley delivers some of the best. Definitely can't wait to stop by again. read more

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O2 Valley still serves a mean grilled chicken cutlet bento box! I've yet to find another restaurant that does it the way O2 Valley does -- crispy, juicy fried chicken cutlet with delicious sweet/salty sauce on top every single time. I also tried their fried chicken cutlet with curry and it's a solid curry chicken rice bento! Exceptional chicken cutlet and yummy curry. I wish the curry was thicker but flavor is great, and this is a good option for a smaller bento box. Prices rose over the years as expected with inflation. Note that there is a small discount for takeout (was a difference of $0.70 last time I went). read more

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A great variety of comforting bentos at a very reasonable price. Everything in the bento complements each other well and feels high quality. Ordering is done through a self-service kiosk, and while the food took a bit to come out, it was well worth the wait. Convenient and delicious overall. read more

O2 Valley - Grilled chicken bites bento and Taiwanese sausage bento - Bubble Tea Near Me - Cupertino, California

This place is my go-to comfort Taiwanese food. Quality is consistently good and the bento boxes are so tasty. I always get the minced pork bento box but all of the other ones I've tried have been delicious too. Prices are decent and the portions are generous. Highly recommend!! read more

Super quick and simple bento spot. I got a braised pork dish and it came with a side of glass noodles and steamed veggies. Nothing too exciting but it screams comfort food. Tasty and no complaints! read more

O2 Valley - Bubble Tea Near Me - Cupertino, California

Such a yummy Taiwanese bento establishment in the South Bay! My friend introduced me to this O2 Valley and I'm so glad he did! O2 Valley sells an assortment of Taiwanese bento boxes, and each box typically contains your choice of protein/entree and an assortment of rice and sides. I love eating a variety of different foods at the same time, so this was perfect for me. The salt and pepper king oyster mushroom has been one of my favorites from there as it is crispy and juicy with delicious salt and pepper flavor. Also, their portions are HUGE! Perfect for leftovers. Their fruit teas and milk teas are solid too. It's definitely the perfect place to go to if you want something simple and easy. read more

The food here is tasty, generous, and truly delicious. It's a taste of Taiwan that I've missed. I would 10/10 cone back for their bento meal. I had the chicken cutlet and tried a bit of the fried squid. Oh, and I forgot to mention their tasty smoothies, tea, and boba drinks. Taiwan is after all the home of boba drinks. Delicious!! read more

I was very disappointed with the food today. I just to LOVE the spicy Thai chicken, the chicken was juicy and thick, today what I got was bits of batter w thin bits of chicken that was almost like bits. The braised pork chop was tasteless ~I ask my whole family of 8 to come here. I believe all the food was 3 stars at best. With all this good food around, your business will suffer if you serve food like this - I will include the pic later. read more

The Bento's here are great value for money! For $16, you get so much of the protein you order, the right portion of rice, a bonus protein side (chicken, tofu), an egg and some veggies like broccoli. Makes for a pretty filling meal. I've gotten the grilled chicken cutlet bento on repeat a few times now and I love this. It's heavily breaded, I actually wouldn't mind it being lighter. But it's not supposed to be 'fried', feels similar nevertheless. I opt for spicy although the spice level is a bit on and off, one time it was spicy (like I wanted it) and another time I could not feel much of the spice/spicy sauce. They do have a spice powder/rub on the table though. And also a garlic powder. I'm generally able to finish it in one meal but it might be too much for some. I've also tried the basil chicken bento in the past and wouldn't rate that 5/5, probably a 4/5. I like the bento lite version with the curry too, it's pretty nice and priced lower with great portions of chicken (popcorn) as well, which is heavily breaded too. I'm yet to try the grilled chicken bites, I'll plan to try that next time. My friend is a fan of the beef shank bento, also pictured. The order is super quick to come out, like within 5 minutes. Friendly and efficient service! Easy to find parking outside in a complex with other Asian restaurants as well. I'm definitely addicted to this place for its bento boxes. read more

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Amazing, first rate very tasty bento boxes, amazing value. I got the cutlet chicken curry lite bento and it was a lot of food. She got the fried squid Bento big portions. Excellent value. Authentic Taiwanese food the PaoChung matcha tea seriously tasted like it was made in Taipei. Very efficient very clean beautiful spot. Sherry at the counter great service. read more

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My go-to spot for something quick, nourishing, and very filling. A delicious Taiwanese style bento box that has rice, protein, veggies, side, and a stewed egg. I always go for the three cup tofu bento for the protein and they usually switch up the sides. All the components are seasoned well and complement each other. There's also a self-serving station with their house made chili oil. Price is up there at $15-17. Hope to see more vegetarian options on their menu bc it's too tasty. read more

O2 Valley - #R16 Three Cup Tofu Bento - Bubble Tea Near Me - Cupertino, California

Food is always prepared well and quickly. I enjoy the rotating vegetables and sides that is prepared with the bento. Bento is large is very filling. Parking can be difficult on the weekends at night and is a bit tight to get through. read more

Quick food preparation and easy ordering. Friendly staff. Clean bathroom. Good value for amount of food as far as Bay Area food prices go. read more

O2 Valley - Bubble Tea Near Me - Cupertino, California