I had a wonderful stay at Francesco's apartment in the center of town. The location couldn't be beat - super close to Duomo, the train station and the central market, yet very quiet. You even have an amazing view of Basilica di San Lorenzo from the windows and patio of the apartment! Don't be concerned about church bells as they only ring during daytime hours.
The apartment itself was clean, comfortable and very stylish. The living room while small was cozy and the big windows ensured you didn't feel too closed in. The main bedroom had a huge vaulted ceiling and comfortable bed. The second bedroom was small and is entered from the main bedroom, so this apartment is probably better for a single couple or someone with a child that doesn't mind the pass through situation. We didn't use the kitchen but it appeared to have everything you would need if you preferred to cook. The patio would be lovely during times of nicer weather.
Francesco was very responsive in the event you needed any assistance.
The only downside to the apartment is that the shower and bathroom is small (which is typical of many places in Europe). Despite the small size we had plenty of hot water and appreciated the heated towel racks.
I would highly recommend this apartment!