Sushi Kaya is my favorite place to go for sushi. The quality of their food is very high for the price. Sushi Kaya offers all you can eat at lunch for $20 and dinner for $25. They also give you a stamp card that gives you a free all you can eat every 10 stamps.
Their sushi rolls are the best thing about Kaya. They have a large variety for everyone's taste palette.
I highly recommend the Sex Bomb Roll, Cinderella Roll, and the Volcano Roll.
The nigiri is tasty too but not the best I've had in Vegas.
What I also love about Kaya is they offer everything for all you eat including pot stickers, skewers (the bacon wrapped scallops are great), soup, edamame, and more!
The atmosphere is great! Very nice decor and the seating allows for privacy. The service is very fast and friendly too- however, on a busy day, it's a little difficult to get they're attention.