Mario was fantastic. He not only has a great place, and a terrific location, but he was very helpful with going back and forth to the train station, getting a taxi, and learning where to go or what to do locally.
And apartment was fantastic – cleaning, very well-equipped, and excellent Wi-Fi. (For our carrier at least, the mobile phone reception was not great. But that is hardly Mario's fault!)
I will absolutely try to stay with Mario again next time I am in Rome.