The apartment was clean and beautiful, located on the -1 floor of the building. Entrance is from the courtyard. There are three windows facing the wall 1-2 meters away.
Pros: clean, beautiful, two separate bathrooms (one accessible from bedroom, another one -- from the living room), walking distance from villa Borghese.
Cons: veeeeeeeeeery slow WiFi (practically unusable), shower in the double bedroom has a glass wall and no curtain to cover it, so no privacy in the shower (however you can get privacy sitting on the toilet, thank God), no view through the window, no kettle in the kitchen, location is a bit far from the city center (about 30-60 minutes walking distance) but that was fine by me.
Overall: apart from small inconveniences we had a great time living there, I recommend this place and Fabrizio.