We stayed 4 nights in early January 2017. It was exactly what we wanted. It's perfect for an ancient Rome sightseeing trip where you plan to eat out 90% of the time. All major monuments are in walking distance (5-25 min). There are numerous restaurants, cafes, and bars within a 2 block radius of the apartment. Despite the 0 deg C weather, the apartment was well heated and served as a nice relief from the cold. Angelo made sure we had everything we needed and answered all of our questions. I'd book Angelo's place again in a heartbeat.
One bit of advice. If you don't have a working cell phone in Italy, make sure you communicate with Angelo on which door bell you should hit when you arrive (there is one for each apartment in the building). I made this mistake and ended up sending an expensive out of network SMS.