Spacious, good location, nice garden, nice neighbors. Private parking is a plus. Giampiero is a very kind and flexible host.
On the other side, the aircon units are *very* loud, we had to turn them off to be able to sleep. It wasn't an issue as they were unable to effectively cool down any of the bedrooms anyway. Also note that one of the 3 bedrooms does not have an aircon unit at all. Opening the windows is also not an option due to the excessive traffic noise during the entire night.
The location of the apartment is excellent for exploring Rome.