Fabrizio's apartment is first and foremost very close to Roma Termini, which was my first priority. I walked there in 9 minutes. It's very clean and the beds were plenty comfortable. Walkable to the Colosseum and other touristy spots like the Trevi Fountain and Roman Forum. A little bit further afoot are Campo dei Fiori and Piazza Navona, as well as uber-hip Trastevere (~25 mins walking at a good pace). Fabrizio was VERY thorough in his communication and friendly throughout.