There are 3 main advantages of this apartment:
1. The decor. It is as pictured. The apartment has a heightened ceiling and feels quite spacious. The decor honors the original bricks and exhibits Roman's appreciation of history and architecture.
2. The location. It is steps away from Cavour station, one stop from Termini station, the main transportation hub. Not only that, Cavour station has a "flat" entrance, meaning travelers can haul the luggage and walk right onto the platform (and connect to Termini) without taking stairs or elevators. Very useful if you need to use the train.
3. The neighborhood. (an extended point of the location). The apartment is very close to the major site -- The Colosseum. It is perfect for touring the "ancient Rome," including also the Roman Forum and Palatino. It is also in the Monti section, home of many bars and restaurants. Yet the apartment is quiet and away from the noise.
There is one main disadvantage though: it's at the 3rd floor with no elevator (in Italian term the 2nd floor, counting from 0). That didn't bother me as I could carry my luggage. And frankly I probably couldn't afford a chic, clean, spacious apartment in a perfect location if it had an elevator -- it's a bargain I gladly made. But elders or parents who have to carry sleeping kids should consider harder.