Had the best stay at Mattia's apartment! Modern interior felt very homey and clean. My group of 12 was housed very comfortably between the two apartments. The apartment is in an area that is a close walk to a metro station, San Giovanni Square, and the Colosseum, but isn't too touristy. It was also only a few blocks away from some really good, not too touristy restaurants.
Mattia was excellent with communicating with me. When we first arrived, the hot water wasn't working, and someone was there to fix it within 10 minutes of sending a message about it. We also had a late flight the day of our check out and were able to store our bags in the apartment so we didn't have to carry them around all day. Mattia was also incredibly understanding with other trouble we had, truly a great host with a great space!