Guglielmo is a great host, available whenever there is a problem or a necessity and his house is very comfortable to spend a few days in the city of Florence. We found in the apt whatever we needed and the position was really amazing: a quiet small road just a few steps from the Ponte Vecchio, Palazzo Pitti and Santo Spirito square.
Great points: Guglielmo didn't have any host the day of our checkout and let us spend a few more hours sleeping and gave us the possibility to leave the baggages in the apt for the whole day, we really appreciated it; we had a problem with the shower and as soon as I called him he came to fix it.
Just a few remarks: the bathroom is very small, we had to prepare the bed because he left the couch close (probably he thought it would have been easier for us to checkin with more space in the room), the windows are giant and difficult to totally obscure so at morning there is a tiny light in the room.