My wife and I absolutely loved Marco's Airbnb for the reasons below. 100% would stay there again.
1) Marco was a great host. Though our plane was getting into Rome extremely late at night, he not only responded quickly to our messages but also came out to meet us b/c we had trouble finding the place. He was also very accommodating, allowing us to store luggage at the apartment on the day of our departure.
2) The place itself was extremely clean, cozy, and had great wifi.
3) The neighborhood is fantastic. There are plenty of restaurants and is located within walking distance to the Pantheon and the Coliseum.