Sara's apartment is great, especially the terrace. The apartment is close to Vatican city and to metro and bus.
It was very easy to communicate with Sara, she replied within minutes/hours. She was there to show us around and to help us if we had any questions.
We stayed here with 4 adults, which was ok because of the good weather (and because of the big terrace), but if you have to stay inside because of the weather, it might be a bit small for 4 adults.
All in all, a great experience and I would definitely recommend this apartment!