We stay in this appartment for 3 days. It was well located, close to a metro station, 3 stops from the Vatican. There were also some buses if needed. A mall with a supermarket and some fast food is at 3 min in walking.
Our host (Stefano) was very flexible for the check-in/check-out and it was a good advantage to fit with our arrival/departure hours at the airport. He gave us also good recommendations on how to use public transport, which are the main attractions and some restaurants.
The flat was very big, we were 7 persons and we felt very comfortable with very big hall, large bedrooms and a nice conservatory. The terrace looked also very nice, unfortunately, it was raining during almost all our stay, so we couldn't enjoy it. Coffee, milk and juice are provided, also with brain and some cereal for the breakfast.
The only small negative point for us was that the appartment was a bit noisy. There is no double-paned window, so we heard street's noise (traffic, people...).
Overall, it is a good price-quality ratio.