Great place, located only 10 min walking distance from "Basilica di San Pietro". Also quite close to the "San Pietro" train station, and within walking distance from many caffes, restaurants, bars and supermarkets.
I stayed at the apartment one nigh with my wife and my 8-year old daughter, and we loved our stay. A lovely, small and cozy apartment, and Marina is always available and give you great tips to move around. Highly recommended!