We stayed at Enrico's place for three nights with five friends.
Enrico was a great host! Although he only speaks Italian he gave us many tips for restaurants, bars and places to visit and was very helpful in all possible ways. When we arrived he gave us some home-made pie, wine and limoncello.
The apartment is also great, close to the city center and restaurants and bars. Also very spacious, clean and quiet.
I would definitely recommend visiting Naples and staying at Enrico's place.