There is a great variation in types and levels of services offered amongst tour operators operating in Vald'isere. The smaller, privately operated companies probably offer a friendlier service and better value for money. All in all there is not much complaining to be heard in Val d'Isère - it's more a matter of level of choice - whether you want a four star hotel or plush private catered chalet or to share a bunk room with the army - the choice is yours.
Bear in mind though that with the larger operators you will appear to have fewer choices and tend to be hearded in whatever direction they have established contracts in the resort. When you are offered ski school for example you will not be told that there are 15 different schools in Val d'Isère, and all with different specialities and values to offer.
List of Tour Operators by Category
Private and Specializing Exclusively in Val D'Isère