There are two conveyor belts that revolve around the center section where the chefs are making sushi. When something passes by that you want, you take it.
California roll, and spicy shrimp and crab roll. Soy sauce, wasabi and chopsticks.
The different colors of the plates represent different priced items. When you are done, the server counts and adds up your plates and you pay accordingly.
Here's a video that I accidentally shot. I decided to upload it because it gives you an idea of what the place is like (all 5 seconds of it...).
It's fun! If you ever get a chance to try something like this I highly recommend it!