Simone is a fantastic host! Having made sure we had really clear instructions on how to get to the apartment, Simone met us & provided loads of information about things to do & places to eat.
The apartment itself is compact & bijou & is basically equipped with sufficient amenities for a short stay in Rome. As others have mentioned, there was some noise from both trams & fellow residents but it did largely die down by midnight.
Transport links are great (there's a tram stop right outside the house, which connects to the metro & gets you into central Rome in about 1/2 hour) & we made full use of a Roma 72 hour pass.