We had great time in Naples and we really recommend this place to stay! Enzo is good and helpful host, communication with him was very easy. Also he provided us some snacks and cleaning supplies.
Localization of apartment is fantastic! It is placed in city center, close to airport, main station, sea, metro station and great pizza.
The main disadvantage is that staircase is narrow and steep, so I don't recommend it for people with injuries, lot of luggage.