Tried the one in Frederiksberg on a weekend night. The sushi itself was ok, nothing special, but…read morethe all you can eat concept comes with lots of problems you don't foresee at first.
1. Unless you're really hungry and used to eating a lot at a time, you likely won't get to order enough off the menu to compensate for the pretty high price for sushi.
2. They save the very best stuff for a la carte of course, so be sure to check the differences between a la carte and all you can eat menus.
3. You only have the table for 2 hours, much of that goes with figuring out the concept, ordering from the cluttered menu which consists of separate books for drinks, a la carte, a paper to fill out All you can Eat options and a tablet to look at pictures of the all you can eat options, waiting to have your order taken, waiting for the food.
(Also, why not just make a paper booklet instead of giving guests a clumsy, germ-filled tablet to click on if you can't use it to interact or order anyway?)
4. You get 1 piece of paper to fill out if you choose the all you can eat option. If you order too much and leave more than 3 pieces of sushi on your plate at the end, you pay penalties per piece. So you naturally don't dare to order too much at first.
The waiter picks up the paper and pen when taking the order, so by the time you get the food and can judge if you're still hungry and need to order more, half your time is gone. Then you need to go through the entire process of catching a waiter, getting a new piece of paper, filling it out, hoping you haven't ordered too much. If you're unlucky and your time's running out or you're dining late and the kitchen is closing, you risk going away hungry.
5. Why are there barely any items on sushi menus these days which include seaweed? Most of the rolls were inside out/rice with toppings without nori around. The miso soup in particular looked rather pitiful with you exactly 1 piece of thin nori floating about in a tiny bowl. Not exactly luxurious.
The hosomaki I ordered was with nori, but I received it without. By the time I got it the kitchen was closing, so I didn't bother telling the staff about the error.
6. Be ready to pay a lot for beverages here. A simple glass of tap water is 25kr and you will pay that every time you want to refill your glass while eating copious amounts of salty fish. Clever.
The reason I came away with a decent experience was that I had other reasons to enjoy my evening, and the staff really did their best although they were obviously stressed out, and most of the food was decent. But all the pointless stuff around the meal ended up wasting time instead of expediting a smooth and pleasant experience, and at the end what seemed like a good deal on paper ended up costing the same with less pieces of sushi than I would've gotten with a regular menu. A regular menu of the same price I could've eaten in peace instead of worrying about how much to order, getting kicked out before I'm done eating, and also having the option of bringing the leftovers home if I so desired for a late night snack. Hard not to feel weird about the experience.