We had a great vacation stay in Rome thanks to the very lucky found of that apartment at Airbnb. A perfect location: just a 20 minutes walking to Vatican or Coliseum, and 1 minute to the Piazza Navona. Highly recommended for anyone who will stay there to wake up at 6am and walk to the St. Peter's Basilica, then you will be able to climb to the dome without waiting in a long queue.
Sergio is a great host, he responded very quickly.
As for me personally, I felt myself like I'm the only one heir of some old lady from Italy :D The apartment is very large and looks a little bit old-fashioned (which I like) but it's comfortable and cozy. Sometimes I woke up at night due to a noise from garbage collecting cars outside, but in general it was a silent place. As I understand, it's a rare find, so we were lucky to stay there.