First of all, Marco is a great host. His efforts to make us feel comfortable were exceptional.
He arranged great transport for us from the airport to the apartment and was very good with communicating with us during the trip.
Of all the things, the location is the best part of this apartment. It's very central near Piazza Navona and we could walk to all of Rome from this place. The house had a very strong personality and was definitely one of the more interesting places I've stayed at.