We recently had a very brief two night stay near the Pantheon in Paris. I wanted to mention two area restaurants we dined at: Le Petit Prince de Paris and Le Coupe Chou.
The first was recommended by our hotel. It was simple and wonderful. We both chose from the reasonably priced menus. Waiters were very helpful, fun to be around and knowledgable. Food was well-prepared, beautifully presented and interesting. Wine was fairly priced. All in all this was very comfortable and enjoyable. I would return here.
I would avoid eating at Le Coupe Chou again. Though the 14th & 16th century fireplace ambiance is definitely worth a visit -- perhaps warranting a glass of wine in an internal sitting room -- this place clearly rests on its ambiance. Food was uninspired, wait staff was generally unhelpful and unenthusiastic, the fireplace draw was interupted each time someone entered the restaurant from outside. We smelled like a campfire when we left. This one felt like a tourist trap.