We really enjoyed staying at Claudio's flat. The location is really good. Although it is not directly in the city center, you can easily walk anywhere (20-30mins to reach the center) or just take the tram, which comes every 5 minutes. The flat is perfect if you are not only planning on visiting Florence but also other parts of Tuscany. There is also free parking available. The flat is basic, but really nice, with cute Tuscan details.
Claudio is a really nice host. Communication with him was really easy and he was really helpful with everything. All in all, I can only recommend staying at his place!