What a heaven for the gluten-free (and the normal hungry folks)! Food is solid and the kitchen is really flexible and able to make most things sans gluten. Frites (can be made gluten free) are great and come with 4 dipping sauces that (I think) rotate occasionally. The soups and burgers are solid. The walnut burger in particular is solidly delicious.
The atmosphere is fine but nothing special. There is one main dining area, which is a little small and open with a door to the outside right in the middle. Depending on where you sit there are occasional cold breezes from the open door or throngs of people standing over you as they wait for a table. Probably best for groups of 4 or fewer.
Jac's is probably best for some of its special nights, including wine night on Mondays where you can get drinks and apps for not many monies...