We had a really good stay at Carlo's place because it is very well situated (shops, restaurants and historical stuff around) and the owner is an kind, old man who is always there if you need something (he also drove us back to the airport). So be nice to him! :) I think we will come back one day cause the apartment was clean and had everything you need for shorter trips. Except of an kitchen. But you won't need one cause Naples is THE place to eat in an restaurant.