We have recently returned from a week in La Rosiere staying in Chalet Chocard, run by Snowcrazy. The Chalet can take 12 people but it was comfortable with only 8, and I think would be a bit of a squeeze with 12, unless you were all one group. It is well equipped and comfortable , and the hot tub was a real treat, though since we were told we had to choose to have either the hot tub OR the steam room on, no-one actually used the steam room all week. There was also a bit of a drainage problem downstairs which made the bathrooms rather smelly.
The ski bus ( free) runs frequently from just outside the chalet, although in the mornings we were transported by minibus up to the slopes, so used the bus more on the way home.
The chalet hosts this season are a very young English couple. They are rather inexperienced and on occasions seemed to forget that they were there to cater and care for their guests. Jenny in particular was rather brusque and 'teenagey - on occasions bordering on the rude!'. Perhaps as the season goes on they will improve. I hope so! Jamie's food is plentiful rather than sophisticated, and a better balance in his menus would be a suggestion for improvement.
In complete contrast, all the other Snowcrazy staff we encountered were delightful and very helpful, and the ski guiding was great, enabling us to get to know the slopes and the resort much faster than we might otherwise have.