OK, so I've only had the udon, but its great! The udon is deep in the menu, so I was skeptical at first, but its good stuff. The Shrimp Udon is the best, as I've since tried the chicken and beef versions. The udon is nice and thick and the soup comes out steaming-hot! Make sure you add some Sriracha if you can handle the spice!
The restaurant has been nice and clean every time, and the staff has always been kind and helpful.
Easily beats out other Japanese fast-food types that I've tried before. Make sure you try some Aloha beverages, if you haven't already!