We stayed 4 days at Fabio and Luca's place. We didn't prepare anything but Luca received us with a perfect french (and even more perfect english) and with great advices, where to eat, where to drink, what is great to visit...
The apartment is very nice, very close to the center (we walk from the apartment to the center through Trastevere easily). There is several great restaurant near by the place, especially for pizza and ice cream.
We totally recommand to go to Fabio and Luca's place !