A wonderful place to stay! Vincenzo welcomed us, taught us a little about the city, and helped us find some remarkable food (no small feat, since we have two young children and are usually in for the evening before many restaurants open)!
He helped us book a car to the airport when we left.
The apartment is exactly as described, which was perfect for us. In a quiet neighborhood, but 3 blocks from the Cipro stop of the underground, which will take you anywhere you want to go.
The Vatican is an easy (if uphill) walk, or just one stop on the underground.