We stayed here for 5 nights and really enjoyed the cabin. It was extremely clean and comfortable. We didn't use the sauna, but the hot tub was great. The scenery was beautiful, with lots of wildlife. The town of Morin Heights is smaller than we thought, but Saint Sauveur is a short drive and has tons of great restaurants.
We were a little disappointed that we did not have access to the resort (Fiddler Lake Resort) that the cottage is situated in (tennis courts, boating equipment, pool, etc), but we still kept really busy with other activities.
Really enjoyed our stay!