The place was great, located near the train station (about 7 mn by foot).
A friend from Daniela was waiting for us when we arrived, she explained everything we needed to know.
The apartment was really pretty and well decorated, we felt very good in that place. Everything was clean.
The only small detail, was one of the 2 nights we were staying, some noises during the night due to the hostel upstairs, but it was not that bad.
We would happily come back to Daniela's place if we go back to Rome another time.