We stayed in the Vezzena room (separate entrance from the others) of Le tre nonne B&B. It was very spacious and the individual bathroom was great as well. Mauro was very responsive to all communications and very helpful in answering our questions. He also leaves guides/maps for you to take and has a book of his recommendations of things to do in Florence. The bus nearby can take you into the center of town if you don't feel like taking the 20-30 minute walk. It is also close to the central SMN station.