Gianni's apartment in slapbang in the middle of the historical part of town. Very convenient for getting around Naples. The place was very clean and well stocked. As other reviwers have mentioned, there are a lot stairs and it can be noisy but thats the payoff if youvwant to stay somewhere "real" rather than a fancy hotel.
Gianni gave me an overview of the area when I arrived and I didnt see much of him after that but I am sure he would have been contactable if I had needed him.