From CIA airport, take a bus for Termini for 5€ and then take Line A metro to Cornelia stop. It was late so ended up taking cab which cost around 25€ from Termini.
Room was clean and large. Luca, his brother, and their cat Lucifer were very welcoming.
The apartment is far away from Colosseum but close to St. Peter's. There is no fan so on a hot night, it gets a little uncomfortable. It's a bit noisy at night even when the apt is in a residential area.
Luca's place is a good deal.