I've tried many of AYCE sushi place in Vegas, and this is probably the best in town (definitely top 5, recently went to Jjanga and that was really good too). Sakana uses about half the rice and same amount of fish as most place (like Yama, which is in the shopping center across Maryland). The rice is nice and fluffy, sometimes a touch too loose.
I come here at least once every two weeks. That's how damn good they are. I deal mostly with nigiri only, but the few rolls I've tried have been good. If you want something spicy try the Call 911 Roll. For appetizers definitely the pang.
Best part is 2 for 1 drinks. Need I say more.