My daughter and I had a little difficulty finding the place. It really is tucked in behind a big metal gate/door. You have to be buzzed in. There aren't any menus. They make one dish per day. Food comes with a salad and soup, no dessert. It is 10 euros per person. The food was good. My only complaint is that the veggies were over cooked, but the French seem to like it that way.
Cons: only one choice (no menu), No dessert, owner spoke very little english