The appartment it's located in an interior yard, very safe, with doorman and even if testaccio is known for the nightlife it was very quiet:) i woke up every morning with birds singing:)
It's excellent cause the neighbourhood it tpically roman, with roman people and not tourists:) also the restaurants are great and a lot
It's close to a beautiful market, where you can either eat or shop groceries
It's 10 min walk to beautiful Trastevere and 20 till Pantheon and other attraction
I really didn t found anything bad or not appropriats there:)