I decided to give 4 stars mainly because of the noise from the street. It was very hot while I stayed there in august and so I had to sleep with the window open. Even with earplugs, it was difficult to sleep and hear the alarm in the morning.
Danilo was there when I arrived and explained to me all the rules of the apartment. He was very respectful and quiet. He made sure I had everything I needed for breakfast which was great. Note that you are allowed to use the kitchen only from 6 to 11 in the morning, but not the rest of the day which (in my opinion) disappointingly limit the interactions with the host.
The room and the apartment has everything you need.
In my opinion, the apartment is a bit far from the main attractions, about 30 min to Coliseum and about 1h to pantheon. However there is a tram stop right in front and many bus stops.
There are nice restaurants and places to hang out at night in the neighborhood.