Cecilia was really helpful right from the start of the booking process, and during our stay she answered all of our questions really quickly. The location is perfect, and despite it being a lovely lively area, the apartment is really quiet. We used the train to Trastevere and then got off the tram at Belli because we couldn't see the Sonnino stop but it was still an easy walk. All the sights were easy to reach on foot and we didn't use public transport at all during the trip.