I already stayed in Orvieto in the past, and this is for me the best accomodation. Elegant, comfortable, convenient, and silent. The staff was always helpful and polite. I could even notice a nice conference room at the first floor.
My only comment regards the parking service, which was inicially adviced without specifying the additional 10€ fee - just for one night. But maybe I was inattentive by myself, and I did not understand.