We had a great time staying at Antonio's place! He was very supportive, gave us all the detailed information we needed to get there, showed us nice places to eat in the neighborhood and was very kind.
The bed was very comfortable, the apartment was very clean and well located, close to all kinds of transportation we need (bus, tram and subway - we used all of them). Walking distance from the Colosseum (20 mins of a nice walk).
If we visit Rome again, we would definitely stay there again! :-)