My mountain biking group have been going to Peisey & Vallandry in the Summer for the last 5 years running. This year, we needed a bigger chalet and decided to have Wittenberg after discussions with PVR (who we've used previously too). It has a large bike shed (10+ bikes) and a huge decking veranda for the obligatory bike maintenance each night! The chalet is right on the return track for many of the routes.
The chalet has 6 twin rooms with 3 on the lower floor and 3 on the top floor. The middle floor (entrance level) has a large floor to ceiling windows facing out across the valley and an open dining/kitchen/lounge area.
The bathrooms are fitted out to a very high standard and the finishing is very good. The only slight downside is that the villa is on a closed bit of road so we had quite a tough time reversing a van and trailer up a gravel track to bring the bikes and gear as near as we could get to the villa. more