My daughter and 2 friends stayed in Antonella's apartment.
They liked very much the apartment. The location is excellent with lots of restaurants in the nearby and it's very close to Piazza Navona and other famous places, such as Pantheon and Fontana di Trevi.
The communication with Antonella was very easy and she also provided for them a transfer from the airport to the apartment. ( they payed for that, but it was worthwhile)
They strongly recommend this apartment!