Silvana's is awesome. It's located in Vomero, so there's plenty of shopping, restaurants and parks nearby. Even old town is just half an hour walk from the apartment. Parking is hard but I was able to find something on the street every time.
Silvana is really nice, she makes you feel right at home and has some very useful tips. The apartment is lovely, very clean and thoughtful decorated. There's AC and the ensuite is a bliss. It's also very quiet so I slept like a baby.
I can only highly recommend Silvana's place and should I ever be in Naples again, I'll look here first!