Fabrizio's apartment is in the San Giovanni area which is away from the central tourist attractions. In the neighbourhood there are some great places to eat, drink and enjoy gelato. On our trip we went Sbanco (a pizza and craft beer restaurant), Trattoria Etruria (Italian restaurant that seemed to be enjoyed by the locals) and Rebacco (a lively bar).
Fabrizio was very welcoming and greeted us with a tour and a bottle of wine. The flat was clean and had everything we needed to plan our excursions and then relax afterwards.
The closest tube station (Re di Roma) is about 10-15 mins walk away which can get you everywhere you need. Travel around Rome and too and from the airport is easy providing you have tickets. We did not try the bus service.