This is a fabulous place to stay when in Rome. it is about a 5 min. walk from the San Pietro train station and the vatican -- but note that tours of the Vatican museum depart from the far side of the Vatican, and it takes about 30 min. to walk to the museum entrance from the apartment. There is a good fruit and vegetable market and a grocery store within easy walking distance. This is not a great area for restaurants, but Trastevere is is one stop away on the metro, Piazza Navuona is only a 30 min walk or a 10 min. taxi ride.
The apartment is light and airy - both the bed and the sofa bed are very good; the kitchen is well-appointed and the terrace is a delight. The elevator is tiny and if you don't close the door very softly, the guy across the hall yells at you. But, the neighborhood is safe and quiet, and completely delightful.