Our 2 week stay in Mario's apartment was very comfortable. As many other visitors have mentioned, the location is fantastic, on a charming old shopping street close to many major attractions.
The apartment in a building from the 1400s (I would guess) had a very good atmosphere, with high wooden ceilings and filled with all the modern conveniences. Very practical! The only thing that differed from the photos on the site was that the rooms were somewhat darker, but we soon got used to this.
Mario was an excellent host, taking care of all our queries in the best way possible. We were interested in Italian churches and his guide on the site gives an account of several places to visit. Very useful!
Thank you Mario! We warmly recommend your place to any prospective visitors to Rome.