Ginevra's flat is perfectly located, in an old palazzio, close to the center (only 15 minutes by foot from the train station, and 5 minutes to all monuments!)
It's clean and quiet, with everything you'd need: great bed, amazing ancient-style kitchen area (with fridge, oven, etc.), complete bathroom, washing machine, etc.
Ginevra also provided suggestions for places to visit and great restaurants — quite helpful!
She was available (by SMS) throughout my stay, even if she doesn't live nearby.
Note:
The flat is located inside an old palace, which has been divided afterwards; you'll find yourself in a maze of corridors, small courts, stairs, etc.
Overall, this was a great stay — the flat is perfect if you're travelling a few days in Florence, and need a simple place to stay!