When we went early DEC, we had lunch at LeCellier which we love the Cheese soup and then the Hamburger which is very delicious. This fills us up for the day. Very nice atmosphere and the pretzel breadsticks are delicious! We tried Chefs de France for the first time this last trip, and ate there for dinner. Wow, what a great meal, but go hungry, esp if you order the "french meal" which most of us did. For about 25 bucks a person, we got french onion soup , then the rotisserie chicken with garlic mashed potatoes and a vegetable i believe, then dessert was creme brulee, which was a huge portion per person in my opinion. The food was great and we will be going back there again for sure next time.
I think LeCellier is very high priced for dinner so we eat there for lunch now every time. Chefs de France is average priced for both lunch and dinner in comparison to other sit down restaurants in Disney.
Whichever one you choose, you will enjoy! Have a great time!