First of all I would lay out the location - it is just marvelous and hardly to be better if your focus is on Vatican. You can really reach the St. Peter square in less than 5 minutes by foot. It takes you less than 15 minutes to Vatican museums, and even other tourist points like Piazza Navona is less than 30 min away. If you prefer exploring the city by bus, its only around the corner bus stop. So the location is really great.
The apartment is spacious, clean, with good and comfortable bed. In the kitchen There are basic necessities, so you can prepare some lunch, coffee or other meals. The apartment is located in quiet - dead end - street and you really don't hear any traffic or other voices in the morning.
For those who travel by car - you can park in front of the building.
Priscilla was excellent host, she helped us with lot's of information about getting around, visiting places, about market and eating places. It was pleasure communicating with her and she really responded fast every time.
Great place and if coming to Rome again, I will for sure consider this place for staying.