We were with the 3 of us and we had a great stay in the appartement of Cinzia. The bus to Stn. Trastevere stops in front of the door and with tram 8 it takes you a total of about 30 minutes to arrive in the centrum near the highlights.
The rooms were clean and spacy, the beds perfect, though it is quite noisy because of the busy road in front of the house. We used earwax and slept well.