I try to use Yelp only as a tool to find restaurants near me, because I think it's generally unfair to the establishment and staff (most patrons have no idea how a restaurant actually works, so unless a server is actually blowing a snot rocket into somebody's food, it's really just some kind of an imagined slight on the part of the customer). THAT BEING SAID: CHECK IT OUT!! We loved Umami, and would most definitely plan on coming back. The food was delicious, the staff was fantastic, and I thought it was reasonably priced.
From the moment you walk in, it has a cool vibe. There are stairs, but it's not a big deal. I totally dig the red neon lights, the wall art (sumo wrestlers!) and the bar was spacious (definitely did not expect that considering the space from outside, so a nice surprise!) our group ordered 3 of the signature cocktails, and they were great. I personally would recommend #GodzillaTears. My friends got Ginger Ginger, and a cute cocktail with an ice ball in it, and they thoroughly enjoyed them.
The quail egg skewer wrapped in bacon was the bomb.com. My friend ordered chicken hearts on a skewer, and she loved it. The sushi and the ramen bowls were excellent as well.
Give it a try! I loved this place and we will definitely be coming back.