I've been to this restaurant a few times now and it has been great each time.
They have an All You Can Eat (AYCE) menu available for lunch and dinner that is pretty great for the price. The quality of the Nigiri is very good, with the fish large enough to cover both ends of the rice, which is something you don't expect with AYCE. The menu also has a very large and elaborate selection of hand and specialty rolls. The AYCE menu also has things like miso soup, chicken teriyaki, tempura, desert, etc... all for $20 per person for lunch and ~$26 for dinner. As others have mentioned there is a time limit listed for the AYCE menu, we actually asked the owner about this the first time we visited and he said it's just there to prevent abuse. I'd recommend the AYCE menu for groups who like sushi and want to try all the different nigiri and specialty rolls.
As others have mentioned they have some great lunch specials. This place is definitely worth a visit if you want some quality sushi for a price that won't break the bank.