We spent only one night in this hotel, but it was a good one.
The view from the balcony really is stunning, even if we were on a side of the building (aren't "Lake View" rooms supposed to face the lake? Still, we could actually see the lake, so...).
You need a car to move to and from the hotel, but if you have one it's easy to get there, and in the morning we reached Montreaux in a 15-minute drive.
The room was very nice, clean, not too large but the bed was very very confortable, which was the most important thing.
We found a bottle of water waiting for us, but we were surprised there was not a fridge -again, not an issue for a 1-night-stay.
We didn't try breakfast as it was far too expensive.