I really liked Roberto's place, it was small but well laid out and had everything that I needed to be comfortable for a week. It's located in the inner courtyard of the building, so it is quiet but still gets a lot of light. The location was also great, with a lot of stores and shops within a block or two, very near the Vatican, and an easy walk to other tourist attractions. No problem's getting into the apartment, Marta was waiting outside for me with the keys when I walked up.