Recently stayed 5 nights with a group of friends and it was an amazing experience. All of the staff we encountered were exceptionally helpful and polite and went out of their way to make sure our stay was fantastic. Job well done!
The breakfast buffet in the morning had a great selection of items. We only ate dinner in the hotel once, but we were in the private dining room and the meal was incredible. We also did a full day cooking class with Jean-Claude and Severine and it was one of the most fun experiences I have ever had. We also did a wine tasting in the private cellar, which allowed us to sample some of the region's wines. Not a bad way to spend an afternoon...
As others have mentioned, the rooms are all laid out a little differently and the decor varies from room to room. We were on the 4th floor and had a lovely view of the gardens and of the Pope's Palace.
My only regret was that I couldn't just move in and stay forever.