I stayed at the Fairmont Tremblant in November 2002. We had a cozy room with an extremely comfortable down duvet, large marble bathroom, and a view of the mountain and village. One of the main reasons we chose the Fairmont was for its three outdoor Jacuzzis, a warm and special treat after a day of attempting to hike to the top of Mont Tremblant!
The Fairmont is a good luxury choice if money is not a concern to you; the staff provides efficient and quick service, and small details such as bathrobes in each room are not overlooked. The high season prices are considerably higher than what we paid. Normally this hotel charges $225 and up per night, but we stayed in low season and paid $150 CAD. Try to book directly with Fairmont either throught their web site or toll-free number, you can find specials not advertised through the Tremblant main reservations center and you can avoid the two night stay rule imposed during high season.