We visited Rome with 4 friends. There is just enough room for 4 visitors, I'd recommend visiting with 2/3, however, 4 people is possible!
The appartement was tidy, everything worked and the air-conditioning was great!
Not sure if this is always the case, but the shower was cold. However, it didn't influence our experience in any negative way!
The location is perfect! Very close to the Pantheon and other tourist attractions. All the large squares, like Piazza Navona or Campo di Fiori are nearby as well.