Great apartment at a great location!
We (a couple of 2) spent a week in the apartment and it was a really nice experience! The location is just perfect, you are in the middle of Napoli, a lot of options for food & shopping are directly outside of your door, waiting to be explored. The metro is a 2 mins walk away and your hosts answer within minutes. The balcony is nice to enjoy some wine in the evening/night.
A strong recommendation!