My wife and I had a lovely week-long stay in Donatella's place. She is an excellent host and is accommodating and helpful in every way.
The room is large with a large comfortable bed. The air conditioner works well even in very hot climate. There is plenty of storage space in the room. The bathroom is also large, with enough space to put all your toiletries etc.
The location is absolutely superb, every major attraction is within just a few minutes walk. There is a ATM and a provision store directly opposite the door. A large supermarket is down the street. There are plenty of good eating places all around. The WiFi works well, and as others have described, the view from the room windows is fantastic, especially of the Duomo.
All in all, an excellent place, highly recommended!