Ayce price is cheap yes, but the menu lacks a lot of items you'd find at other restaurants.
We also waited a long time to get our first order. The most filling & cheap items (coincidentally?) came first. We didn't get our sushi for about half an hour after handing in the sheet. Food was coming out so slowly that we would finish everything they gave us and sit without food again for a few minutes before the next dish arrived.
The second (smaller) order we made came out much faster though. However by this point we waited so long for the first order that their strategy of going slow worked, we weren't that hungry anymore.
To sum it up, it's cheaper but you get what you pay for. Perhaps the a la Carte is better here.