My girlfriend and I were in Roberta’s apartment during our visit to Roma and it is a nice place to be, highly recommendable. The apartment was clean and equipped, despite it was freezing outside the days we were in Roma, Roberta set up the heating so we were warm and comfy.
Regarding the location the apartment is near Vatican city and bus / train stations, there are a lot of good restaurants in the area and some supermarkets, so you have always an option to eat and the kitchen is fully equipped, so you can cook something if you are tired.
It was a pleasure to stay at Roberta’s apartment and hopefully we can come back one day.