If I could go here every day I would. The pork and shrimp shumai is my absolute favorite. Typically when a group of us go we need at least a couple orders of it. The the pork belly robata is also a favorite of mine, and really I could go on and on listing the items I love at Umami. Not to mention the atmosphere is excellent. They have a DJ there most nights.
The only downside I'd have to say is that it is a bit of work to get there as it sits above Cantina. It's not the easiest to find and lots of stairs.