We had a super nice stay at Flavio's apartment in Rome. It was clean, big enough for our group of 8 people and the beds were all comfortable. :)
It is located just next to the Vatican, about 15-20 minutes walk to the historic centre.
On top, Flavio was very responsive when it came to managing the practicalities of our stay (booking of a taxi for late-night airport pick up, etc.). Finally Flavio was super flexible in terms of dropping time of the keys, luggage storage, etc.

Thank you for your help! :) Ciao!