Maria's apartment was a clean, quiet (for Naples, I think) oasis in the hubbub of Naples. The apartment was a 15 minute walk from the main train station--we did take a taxi there, but walked to the station with luggage when we left the city. We were less than 10 minutes walk from a subway station, 15 minutes from the Archeological Museum, and 5 minutes from the underground Naples tour area, as well as the Duomo.
We were greeted outside by a friend of Maria's, who ushered us from the narrow busy alleyway through the green gate into a calm, worn local courtyard, and then into the hallway to our peaceful clean apartment.