Mattia was very professional and extremely friendly. He helped us with our flight booking home, when we couldn't find a printer. If we had a question, he would help right away. The apartment was really lovely with air conditioners (it is hot in Rome, during the summer). It was nice and clean with a dishwasher and a washing machine, and Mattia had the appartement cleaned half way through our one week stay.
He arranged our taxi from the airport and back, even when we had to leave Rome in the middle of the night....
The apartment is really close to the town center, you can easily walk to the Colosseum. We highly recommend the apartment, and also Mattia as a wonderful host. If we ever come to Rome again, we will definitely stay with Mattia again.