We came here on a Tuesday during lunchtime, and it wasn't too crowded so service was really fast! Basically you order cafeteria style: you bring a tray with you, and the employee will ask you what style of udon you want. They'll then prepare the udon for you on the spot, and once you grab your bowl you can grab an extra toppings like tempura shrimp.
Drinks are self serve, and they even have CALPICO on self serve!!! AHH that made me a lil' excited!
Anyways, food was solid, service was fast, and I wish they had this back where I came from so I could savor it more.