The apartment's location is perfect: close to the Barberini Metro station, close to museums, and close to all central areas of Rome. The apartment is spacious.
There are two drawbacks:
[1] unfortunately the apartment is extremely damp. There is a washer in the apartment which works fine. However, even after three days clothes were not dry. In addition, the host only provides one set of towels for each guest. The towels stay wet and never dry, and if you try to wash the towels, they do not dry in the apartment. Bring or buy another set of towels. In addition, the bed linens feel damp. Books and papers that you bring with you feel damp. If you have respiratory problems, do not rent this place.
[2] The kitchen corner is extremely small, there is only a small portable stove unit which allows you to heat water, but that's it. You can't cook. If you intend to go out for lunch and dinner during your stay in Rome, then this won't be a big deal, but if you intend to cook in this place, do not rent it.
If [1] and [2] are no issues for you, rent this place. It is a nice apartment, and the host is very responsive. We enjoyed our stay.