Valeria, and her apartment were amazing. Located smack in the middle of Centro Storico, my favorite part of Napoli, your apartment is tucked away a a tiny little street in a private apartment complex. Despite the central location, there are no hotels nearby and the neighborhood is most locals, which really gives you the feeling you are living in Napoli.
Valeria offered us Prosecco and cake on our arrival, and remained very helpful in all our trip planning with directions and suggestions wherever we wanted to go. She even walked us to De Carmine, a delicious trattoria a few blocks away, where she knew the owner, and got us a table immediately for what turned out to be one of our best meals in Napoli. Ask her about it. I can't say enough good things about her, you should definitely stay here.
One negative thing to note: there's no AC of fan in the room and it can get very hot at night. However this is a small drawback in an otherwise overwhelmingly positive experience. If I ever come back to Napoli, I would definitely stay with Valeria.