The apartment is nice, especially the location is very good. It is close to the Vatican, a metro station and a 24 hour grocery store. It is quite big and there was more than enough space for 5 people. It is located in a basement, which means it only has two small windows under the ceiling and that makes it difficult to let fresh air inside (although there are air conditioners which help a bit with that), but the lightning is good and the ceiling high so it does not feel claustrophobic. There is only street parking, which can be hard to find and is not free of charge.
Otherwise we enjoyed our stay in this apartment and the wonderful city of Rome.