We had an amazing experience at Sandro's apartment.
Sandro is a great host, although we didn't meet him. But, almost every day he called me to ensure that we don't need anything.
The apartment is very spacious and well equipped. It is very well situated, just 5 min from Vatican. We walked from the apartment to many tourist attractions like: Plazza Navona, Plazza Popolo, Plazza Spania, Borghese Gardens, Vatican etc.