Palazzo Mazzei is the best AirBNB I have ever had the pleasure to stay in - and it's far better than a hotel.
The location is perfect - the Oltrarno area is not as crowded or touristy as the city center, but all the sites are only a 10 minute walk away.
The apartment itself was absolutely gorgeous; a combination of old-world charm with modern amenities (air conditioning, dish washer, washer/dryer).
I couldn't have asked for a better place to stay on my vacation. Graziemille!