Carlo is a fantastic host, he even came to apartment in the middle of the night to make sure that everything goes smoothly when we arrived.
Apartment have excellent location between Termini and Colosseum, just next to Cavour metro station. Many places are just on walking distance and it's easy to explore Rome from this apartment because everything is so close. There's excellent restaurants nearby as well as cafes where you can enjoy Italian breakfasts.
Price and quality ratio is very good especially for bigger groups and I can easily recommend Carlo as a host.