We stayed at Marzia's place for three nights over the long weekend. Her assistant Peppe met us and showed around the apartment. There were absolutely no problems during our stay. The place is beautiful, very central and also very quiet (!), despite the restaurant next door, where opera singers perform on weekends. We actually enjoyed listening to their singing though the open windows; but once the windows were closed, it was very quiet in the apartment. Getting around was also easy - we usually either walked or took taxi. It is about 15 min walk to Vatican, 10 min walk to Piazza Navona and the taxi stand is 2 min away by the river. We really enjoyed our experience and would come back to this place again.