The room at Fabio's was clean and comfortable. We enjoyed it a lot. The breakfast was appealing, and the garden it was served in is really beautiful. Fabio was a gracious and very accommodating host. He contoured his schedule around our arrival, making it easy for us. I strongly recommend his place.
Possible drawbacks: having a car in this part of Florence is very inconvenient. Parking is expensive or a kilometer away, and unloading must be done fast while pulled up on a sidewalk. Also, when we opened the window (ground floor) there was a good deal of noise from motor traffic and people talking as they went by -- if this bothers you, you might not like it. It didn't bother us. But Fabio has other rooms in the same building that are more shielded from the noise.