We stayed in Mario's flat for four nights and we really enjoyed our stay. The apartment is perfectly located (200m from Roma San Pietro station and also very close to a 24h supermarket, a short walk away from St. Peter's square and there is a bus from the station to get to the center quickly). We arrived very early and Mario provided us with a place to stay before we could check in. He always was very helpful throughout our whole stay.
We really enjoyed our stay in Rome and will definitely try to stay here again, should we return to this beautiful city!