I spent a full month in the flat. The greatest thing? Location!...and I'm from Rome. :)
At the heart of the city, you can walk to the most iconic places: Trastevere, Testaccio, city center. I loved my daily evening walks!
The flat is small but fully and functionally furnished. No problems, even for long stays. For people who are very (!) sensitive to noise, be aware that it's a tiny street full of restaurants (and wonderful white huge seagulls at night) and it could be a problem, especially in summer with open windows. For me, it wasn't an issue - the restaurants' noise is bearable (they are restaurants, not pubs or clubs) and it stops around 10:30-11:00 already.
Michele is very gentle and extra quick in replying and fixing things when needed. He was really welcoming and available any time. Great guy.
Great listing overall!