Fantastic apartment. Very neat. Nicely decorated. Very clean. Hosts couldn't have been more helpful throughout booking and while we were there with nothing being too much trouble Helped us with transport from the airport, and with recommendations to restaurants, coffee places and everything else useful. Apartment has a washing machine which was very useful. Air conditioning works very well. Apartment nice and quiet at night.
Only slight negative comment would be that it's up two very steep staircases, so anyone with very heavy suitcases will have a good workout or need a lot of help.
Best part of the apartment is it's fantastic location. Very close to the Vatican, but very convenient for most of the major tourist spots. Highly recommend.