Riccardo's apartment is very centrally located and the only public transport we used was to get from the SMN train station to the airport at the end of our stay. Absolutely everything worth visiting in Firenze itself was within easy walking distance. There were also plenty of restaurants and a few bottegas and supermarkets close by.
The apartment itself was well-equipped, though the decor might not be to everyone's taste. It could be considered a bit rustic, but it all worked and was comfortable. It was also quiet because it is located up a smaller alley in an area of town where traffic is limited.
We would certainly consider staying there the next time we are in town.
Grazie!