Albergo Bernini is a B&B in a 1300 year old building, recommended by RS, and by me! The terrace has the best view in town of the duomo, and the proprietors are very nice and helpful. The rooms are simple and clean. The only down side is the bathrooms are not in the rooms, but there are only 8 rooms and 5 bathrooms. We never had to wait, or even saw anyone else. We always try to have a private bath, but made an exception here because it was in such a perfect location for walking the medieval city. It was really inexpensive and great fun. The bus drops you just a 6 block walk away from this B&B. If you take the train, you'll have to hire a cab to get there. My best advice on the bus is get there early and line up. If there are two of you, one needs to handle getting the bags into the luggage compartment, while the other grabs seats. Don't be shy -- there is not enough room for baggage. On our first bus trip, we wound up with half our luggage in our laps, and separate seats for the four of us! After a strategy change, the next trip went well, with our luggage stowed underneath and the four of us in two adjacent rows! Good luck!