Antonella and Marco have great attention to detail. They answered questions before we knew we had one. Their listing is accurate, and indicative of their excellent approach. They contacted us well before our trip and gave us a great heads up on how, and, more importantly, WHEN to buy tickets (which is one to two months before you want to go!). They have a great binder of information, with many great recommendations, includinng Li Rioni, and Da Domenico restaurants, which were both excellent.
The place was spacious, well decorated, well equipped, great AC in both the bedroom and the LR, has a very comfortable bed.
The location is two blocks from the Colosseum. The neighborhood felt safe. We walked to the far side of the Colosseum/Forum at night to watch the full moon rise, and never felt nervous. There is a nice supermarket, Castoro, about 10 min from the place, and smaller markets closer. You could get to the metro in 11 min, either near the Colosseum, or in the other direction. And get where you want to in a short ride.
Great place to stay in Roma!