We spent 4 days at Massimo's place. It was excellent! It is very well localized, close to the Coliseum. There's a metro station nearby (Rome has only 2 metro lines, and the San Giovanni station which was close by is on line A, seemingly the most important one) and plenty of buses to go around. The flat was excellent, clean and felt like a nice hotel room! Great value for what we paid. Massimo and his family were very kind and gracious. We recommend their place for all!