If you want to stay in the Centro storico of Naples I can recommend Giuliana's place. Well-equipped, spotlessly clean, friendly and helpful hosts. Unfortunately, for us, the location was a no-no. We should have researched it better; but the old part of Naples is very run-down, dilapidated, with buildings that must once have been palaces but now suffer sadly from neglect. So do your homework and look at Google Streetview and other resources before you visit.