We visited Marche Restaurant on a Friday evening, 7pm, and we had to queue for 30min to get in!
Expectations were high after waiting so long and if you just ignore the strange cliché swiss decor as you proceed to the basement restaurant, then the rest of it did not disappoint.
I think its success lies in the concept. It is setup like a Market Place. On arrival you are given a credit card, that you hand over to the staff behind the different food stands and they charge for the individual order. You can choose from a wide variety of dishes, loosely based around Swiss cuisine.
We went for a Swiss classic of a Rösti, with Smoked Salmon and creme fresh, plus a Ham, Mushroom, and swiss cheese crepe. Washed down with a couple of glasses of wine of course!
They also do a great selection of fresh breads and pastries, which is quite difficult to find in Singapore, so if you can't face the queue then the deli is a reasonable substitute.