Everything was just as described and incredibly smooth. Flaminia's brother, Fabrizio (who lives in the building), met us with the key and was very accommodating. The apartment is huge (more than enough space for at least two couples or a family) and very central and well-located for reaching most parts of Naples by foot. While the immediate surroundings don't have much to offer in the way of restaurants/cafes/etc., several great spots are within walking distance. Flaminia suggested using a nearby garage (Via Nardones 60), which I would also recommend for folks arriving by car, since the streets in the neighborhood are very narrow and street parking is effectively impossible. The folks at the garage were friendly and for 20 Euro per day, we knew the car was securely parked. Conveniently, the apartment is just a short walk (under 10 minutes) to the ferry port, which made a day trip to Capri very easy.