Fabio was an outstanding host. The best part of this place is the location --literally 100 yards from the Pantheon, and within easy walking distance of many major landmarks, including Vatican City, the Colosseum, Palatine and Capitoline hills, the Spanish Steps, and so much more. There are also many reasonably priced restaurants and shops nearby.
The space is unique and quirky. It's in a 500-year-old building, but
Fabio has updated it with modern amenities. It is not huge, and one of the double beds and the single bed are in lofts accessible by steep stairs. (The other double bed is a fold-out couch.) It is comfortable, clean, but not a place to hang out in -- best as a base of operations for visiting Rome.
Fabio actually met us at the airport and drive us in (for 50 euros, which is the cost of the cab ride), and made sure we were settled. Great host!
I recommend his place highly.