We liked the apartment very much - it was spacious, clean, and the kitchen was well equipped with everything it needed. Having wireless internet was a big plus for us. The hosts were pro-active, contacted us ahead of time for details of our arrival, and were extremely helpful in answering our questions.
The apartment is situated a little far from the center of the city, but it has excellent connections to the public transportation system, so by bus, you can be in downtown Florence in 20 minutes. If your wish is to be located right in the center of the city, this is not the place to be. The plus of being a little bit further away is that you can easily find parking.