Federico was very simpatico: timely, helped take our suitcases up the one flight of stairs, thoroughly explained the apartment's facilities and the possibilities in the neighborhood. When I lost my key, he was on the spot in 20 minutes to let us back in. The apartment itself was all that we hoped for: it was small (as you must expect in Rome's center) but functionally very up-to-date. The adress at the end of a narrow dead-end street is unpreposessing, but that has the advantage of eliminating street noise. The location is about as good as it gets: very close to Piazza Navona and within walking distance of everywhere else we wanted to visit. I would definitely recommend the apartment to a frient.