There are a LOT of all you can eat Sushi places in Vegas, Brian's Beach is the best. Great value for the price, $25 for AYCE... and it includes appetizers and deserts, not many places do that.
2 reasons I'm not giving this 5 stars though. Their alcohol prices are a little steep. And as good as it is, it was better a few months ago. I don't know what changed, maybe a new crew of Sushi chefs?
Anyway, great food. Garlic Tuna is one of the greatest things I have ever eaten in my life. Also go for the Tuna Carpaccio (without mayo, eww) and the Almost Fire roll.
Just a side note here, I was finishing the review and there's a section for "good for groups" in which I said no. This is a really small place, keep that in mind.