The apartment is exactly as described. Its neighborhood is not exactly beautiful, but well supported by mini markets, small restaurants and coffees. It is quite close to u3 tram line that connects you to the Coliseum and metro line A. If you are not concerned about how fast to arrive in Vatican (u3+Metro A are faster), tram line u9, in the same stop, connects you to the Vatican and also Villa Borghese.
But Mario is a case apart. Really a wonderful host. He provided us, in person, all the support that we need during our stay. We could say that the apartment was exactly what we were expecting for (location, accommodation, etc) but Mario made the difference. Thank you very much Mario.