I thoroughly enjoyed my stay at Gianpaolo's garden apartment. It was clean and quiet, and Gianpaolo went out of his way to make sure I had everything I needed for a comfortable stay. I had some issues with the lock on the front door (it was completely my fault - turn the key a quarter more to the left than you think is necessary) and he responded within minutes both times I called, cheerful and eager to fix the issue. He was a fantastic host.
The apartment itself was a lovely, traditional Italian apartment with a beautiful garden area. Once you close the door to the bedroom there is almost no street noise, which is rare in Florence, so you are able to get a good night's sleep. It's located about a 15-20 minute walk from the Duomo and less than 10 minutes from the Boboli Gardens and Pitti Palace. There are lots of restaurants, gelateria, and shopping, as well as a market just up the street. It's a great apartment in a great location.