I can highly recommend Roberta's apartment! The location is great: very close to the Vatican, only a few minutes to the Metro Ottaviano and to Piazza del Risorgimento with lots of bus connections. Supermarkets and restaurants are right around the corner. Despite the central location, the road is still quiet at night so you can sleep well. It was super clean, lovely decorated, the beds were comfy and the kitchen was well equipped. Everything looks like pictured on the photos.
Roberta was also a lovely host! She always responded quickly and was very supportive regarding restaurant recommendations etc. She even helped us when we had issues understanding Italian. Check in and out went smoothly and I was allowed to check out late.
So you will definitely enjoy your trip to Rome staying in this apartment!