Mixed experience, but overall positive -- was there for breakfast, and the lightest thing was a…read moresort of cheese/ham quesadilla, and it was really good, as was the coffee.
As others have mentioned, the servers are good at encouraging additions that aren't clearly extra charges. This could simply be cultural -- in the States, different dishes come with things like lettuce, tomato, etc. -- and if there's an upcharge, they tell you. It's not clearly stated here, but I don't think this is specific to Urban Corner -- so just know if something is offered, it's a paid add-on. So I added on avocado, which was worth the additional cost!
Another thing that's different is one you've gotten your food/order, they don't come back and check on you -- so my coffee got cold and I would have liked more, but my server wasn't around for me to request it. The good part about this is they don't rush you -- so if you're at the airport early it's a good place to sit and hang out before your flight.