We loved our stay at Riccardo's flat in Florence! The apartment is very modern, clean, and ealking distance from all major sites--Uffizi, Ponte Vecchio, Piazzale Michelangelo, Santa Maria Del Fiore (Duomo), Mercato Centrale, etc.
Riccardo gave us great restaurant suggestions (Il Latini was our favorite!), printed our Uffizi tickets for me before we arrived, and ordered us a cab to pick us up and bring us to the train station. He was a great host and we would highly reccomend staying at his apartment!
It does get a little noisy early in the morning when the trash trucks come, so you might have a difficult time sleeping in if you are a light sleeper. But we did not mind, since we woke up fairly early each morning to see the sites!