First of all, the host, Carlo, is a very nice guy with loads of suggestions. This was our first AirBnB experience in Europe, and we couldn't have imagined a more attentive host.
The location was exactly what we were looking for, an older (15th century) building in a more local (less touristy) area. We walked everywhere in Florence and the location seemed ideal for that. It was great to be able to visit the sites with the masses of people and then walk back to the simplicity of our temporary home without all the fuss. There's a Conad's supermarket a few blocks away which we found to be ideal, as well as an art supply store in case you become inspired by the Accademia or the Uffizi.
To put it simply, we had a great stay with a superb host.