Mario's house was just amazing, perfect view and perfect design with a great terrace, even we couldn't really profit from it because of the cold weather but it's really nice terrace, the area is the best area in Rome especially at night for going out having fun etc... and the most important is that you know you can go back home at night after a party or after drinking a bit by foot and that's really great.
We saw Mario the last day just before our leaving we could leave our luggage in his house and we could visit the colesseo in the morning then we took our luggage, Mario was really nice person and he gave us all the necessary facilities for having a good journey, his friend patrizio welcome us in our coming and i have to say that he was very smiling person, funny and helpful even with the minimum of english communication he had.
If one day i'll be back to Rome, for sure i'll stay in Mario's house, and if anyone wants to visit Rome i recommand Strongly Mario's house.