Sat at the sushi bar; it was like sitting at a table alone, you can't see the fish to determine freshness, etc., what I usually do at a sushi bar. This is a very pricey place for what you get, the nigiri are smaller pieces than any place I've ever visited, and they are on the average $1 more.
There are quite a few other places in PHX that don't let you walk away hungry, serve excellent, fresh sushi and have a personable staff. Yasu falls short on value and personable staff.
If you are interested in a trendy place with great atmosphere, and are unconcerned with cost, this is the place.