We were extremely happy with our stay at Flavio's place. The location is excellent, very close to the Vatican. We visited the Vatican on two consecutive mornings, so it was very convenient. It is a bit further from the city centre, but walkable in ~20 minutes. From Roma Termini we took the train and arrived at Roma San Pietro station in 20 minutes. The stations is just 200m away, but make sure you go out from the station at the right exit! There are plenty of restaurants and gelato places around, as well as a supermarket nearby. Flavio was very kind and allowed us to leave the luggages in the apartment in the morning, while it was being cleaned. We would definitely recommend staying here!