Pietro is a lovely person and an excellent host. He speaks good English, explained me everything and provided me good tips. The house is located in a residential neighborhood and the room overlooks an inner yard. It is therefor relatively bright and very quiet at night. I slept like a baby. The whole place is also kept very clean. You can find a Metrostation in walking distance (3 minutes) where you can catch a metro that takes you to the historic center of Florence (only one stop, max. 5 minutes ride).
The only small minus: the bed is a little too short for tall people like me.
Anything else was perfect!!