We had very good time in Chalet Mousseron and Chamonix. The location of the chalet is perfect. Very quiet area and only 10 min walk to the town centre.
The chalet itself is very well equipped. We really felt like at home.
There was one unpleasant situation when someone (from an agency or the owner) entered the chalet during our absence. I can understand they wanted to check something but they should inform us in advance. It is a strange feeling when you back from a hike and discover that someone was in your home.
Anyway, as I said earlier, we had very good time and we will try to rent the same property if we are back to Chamonix.