We stayed at Giancarlo's place for a whole week, and it was great. The apartment is very well connected (either by Metro or bus), and has everything you need (including great Wi-Fi if you're working from home). We had a little issue and Giancarlo solved it hours! If we come back to Rome I would stay here. Also, the place has 2 great ACs which save our lives as it was incredibly hot in Rome.
Grazie Giancarlo!
Only thing to note: there are some shady people in the street next to the apartment, but we didn't encounter any problems and we felt safe at all times. I guess this is just part of the area!