We had an excellent stay at Paolo's apartment! The apartment has plenty of space and the bedroom has high ceilings with big windows at the top, so even though there were three of us, we never felt cramped. The location is great -- right next to the Ponte Vecchio, so you are right in the heart of Florence.
Paolo is also great and super professional. He greeted us with maps of the city and showed us how to get to all of the major sights. He gave us recommendations for restaurants and for the best gelato in town, and when we told him we had an early train out of town, he ordered us a taxi for the morning.
I would definitely recommend staying at Paolo's apartment! You can't beat the location or the professional service!