Hi Christian
Our group has been there twice and the intermediates skied all over the place and loved it, you can't go much wrong. My favourite runs were at the top of the Solaise in Val D'Isere.
If you stop at the Folie Deuce (which you must) take enough money, it's extortionate
In Le Lac there's a great, cheap bar at the bottom of the Trolles. Not very French but very friendly.
Enjoy