Before we arrived, we had a very good communication with Federico through email. He offered to send a taxi to the airport, the driver was waiting when we arrived, Federico waited for us in the apartment.The apartment is clean and renovated, little bit dark during the day, but in perfect location and in great neighborhood.
20 minutes walk from St Peters basilica, 5 mins from Piazza Navona, good restaurants all around. And in the middle of all of this, the street is very quiet. Going back to Rome I would definitely stay there and would recommend it to my friends.