Yuukai is a small, fancy lookin joint with OK lookin waitresses.
The sushi is fine. It's neither the best nor the worst in the city.
The non sushi items are very expensive. How they get away with charging 18$ for what amounts to a completely average plate of udon remains a mystery to me.
In terms of starters, 7$ wakame salad is at thing at this establishment. I wish I was kidding, I'm not. It's like buying something pre-made for a buck and then charging you seven for putting it in a bowl. Actually that's exactly what it is.
The meal was acceptable. We ordered sushi and a vegetarian udon dish.
The place is very noisy. Had trouble hearing one another in conversation, not one of their strong points. Sound insulation is an issue.
I would recommend one of the all you can eat joins that are somehow less noisy and offer a much more vast menu and, in the case of crescent sushi, better quality, fresher fish.
I wasn't particularly impressed. If you truly enjoy sushi and you don't like noisy places, avoid it.
Otherwise, it's passable.