Let's be clear, this is one of the best airbnb in Napoli.
I have already been in about fifteen airbnb in Naples and this is the best. I doubt you could find a better place to stay in Naples.
The apartment is absolutely clean and new. It has air conditioning in both bedrooms and in the living room, there is a full kitchen, a washing machine which is also a dryer. Both bedrooms have a balcony, the mattresses are of excellent quality and there is a TV in each bedroom.
The apartment is located in the center in an ideal location for visiting the city by foot (or in metro, 100m to reach it) and to embark for the islands (port 300m). The double glazing means that you can sleep without any problem despite the traffic (I slept very well even though I need total calm to sleep).
Anna is a very attentive host who responds to questions very quickly. When we arrived there were gel shower and others things in the bathroom, something to eat in the kitchen and even a bottle of wine!
I highly recommend this apartment.