Went there once but it was donkey years ago... think in 2000/2001. Well, it's like the jap version of Marche, where you will get a card to record the food that you order from the various counters/stalls, then pay at the exit using the card when you are done.
Prices were pretty steep, around $15-20 I think, and I din see much variety then. Ended up eating a kids' set for less than $10 (cannot remember price liao) but it was really cute, with yakitori sticks, a bottle of yakult and a free magnet! Served in a cartoon rocket place too

Good ambience cos a lot of cosy corners for nice chats, but guess unless you are on a generous budget of around $20-25, you won't want to start there for long cos cannot eat anything cheap there, haha...