We stayed at the Club Med in Les Arcs a couple of years ago.
It is very close to the Vanoise Express cable car which links Les Arcs with La Plagne.
Les Arcs tends to get slightly better snow of the two resorts, as it is more sheltered and the snow settles better so would be preferable if you are skiing very late in the season. But La Plagne is a lovely resort and slightly quieter.
The Club Med set up is great - the food was outstanding, lots of entertainment (if you like that sort of thing) and the rooms were bigger than the Chalet average.
The only downside is that your lessons are provided by ESF, which are a very second-choice for me behind New Generation or Evolution 2, but I know others are happy with them. ESF groups are much bigger than the other schools though, and in quiet weeks, they mix up French and English speakers (although this is unlikely to be an issue over Easter)
We booked via IfYouSki and got a great deal, with BA flights and private transfer from Geneva to the hotel so it all worked out as excellent value for money, especially as we didn't have to spend much at all once we were in the resort.