Our host met with us at the guesthouse and has her office in the apartment. The apartment building has a doorman during the day and he went up and knocked on the door for us. Telephones can be a spotty way to find the host:). The location is a Guesthouse, not so much a private apartment, very close, truly walking distance, to the Vatican, Saint Peters, Castel San Angelo and City Center in a very nice neighborhood of like apartments. The rooms are clean and spacious as the pictures depict and the AC's in each room work wonderfully. It is set up as a guesthouse with each room lockable which was different. You rent the number of rooms you need and they unlock those doors up to four bedroom. It is two story with a steep staircase down to the common room and two of the bedrooms if you have trouble climbing. Each room has its own restroom, all with showers. The large building has several local restaurants around the corner from the entrance which were not crowded even on this weekend and we enjoyed them. We met both of the sisters during our stay and they were very helpful and friendly although their English was only slightly better than our Italian. Not a problem, just part of the experience.
If the area is good for you, this is a nice alternative to a hotel. The only knock we would have is no washer and dryer and no true stove to cook although it has refrigerator and toaster oven. However, Spaghetti and Lasagna in the restaurants were on 7-9 Euros, so who wants to cook?