Five stars: Family of four stayed for a week. We loved the easy access to the old town and using the tram from the airport was very simple.
Kind host, reliable WiFi, spacious for an old town apartment, comfy bed in the bedroom, quiet overnight in the bedroom (kids were in the front room but the neighborhood in general seemed quiet after dark, they slept fine). Kitchen has two burners, but we did tons of cooking... we had what we needed. We walked everywhere and loved our time in Florence.
The only discrepancy is the listing accidentally said it had a washing machine (it doesn't but the laundromat was a short walk away, not a hassle at all). We would definitely stay again. Thanks Stefano & family!!