This hotel is such a charming place. The views from the room we stayed in were unbeatable - we had the Duomo within our sight. The room for 3 was huge and I think it's possible to put in 4 people comfortably and still have space for stretching.
While there was no breakfast served, the very fact that the hotel is located right smack in the middle of everything made getting biscuits, bread, coffee, etc so easy in the morning. However, if you are concerned about noise and are a light sleeper, this is not the place for you because of its location, it is noisy at night and early in the morning. Otherwise, this is one property with plenty of character given its 700 year old history (we had frescos in the ceiling of our room!)
Oh yes, did I mention that the train station is about 7 min away by foot?