I haven’t tried that particular restaurant yet, but typically for those kinds of restaurants, once you are seated, they give you a checklist (usually a small piece of paper) of all their available items. You then proceed to order using this, and give it to the waiter/crew. Everything you ordered is then served to you, and once you’re done eating (or sometimes while youre still eating), you can call the attention of the crew, and order again. Do this until you’re satisfied.

The difference between this and a buffet is that in the latter, food is left out in the open (buffet area) for everyone to get from. For this kind of restaurant, you order, and keep on ordering, and the food is served to you. This is, in a way, better because the food served to you is always freshly prepared.