We enjoyed staying here. It's located in a quiet area a little off the center of Florence but you can get there by a few minutes of walking or some busses. Also the bus line to Fiesole is not far away - we recommend going there.
Note: If you don't speak Italian or Spanish, ask Claudia if she'll be there for check-in, since her mother only speaks these languages. Or be prepared to use a Translator app which she is familiar with and which worked fine for us.
Also be prepared for some mosquitoes in the room since the street is next to a canal. Wasn't that bad, we just had to catch them before going to bed. A mosquitoe net in front of the window would help.