My family and I really enjoyed staying at Paola's apartment. We were in a central location, walking distance from most of what we wanted to see in Rome. The apartment is far from the metro but the bus system picks up from nearby. The apartment itself is clean but very utilitarian.
Paola was very quick to communicate with me prior to the trip and even helped me arrange for a taxi when we were leaving. She met us there on the morning we arrived and helped orient us to her place and the city.
My only note would be that AirBNB has this apartment listed as being on the east side of the river when it is, in fact, on the west side (same as the Vatican). This wasn't a huge deal but is of note.