I've had both A-OK experiences at Yama and sub-par experiences at Yama. It really depends on the day and time that you go.
For me, there is one chef who seems to remember my friend and I, so we get a good meal whenever he is working. Bar sitting is a must here, you get much better service and it's not as cramped as the tables.
The fish is standard for AYCE. I usually just stick with nigiri, one of everything! I have been partial to the masago/quail egg combo as well.
For the price and location, Yama Sushi is alright. Don't go here during busy times though, the wait can be long and they want to rush you outta there.