I spent 3 days in this appartment together with 2 other friends.
We liked everything about it and we highly recommend it.
The appartment is only 15 minutes walk from the train station and the bus station of the airport shuttle bus.
The appartment is only 25 minutes walk from the historical city and the main attractions.
The neigbourhood is safe and there is a supermarket right next door to the building (opened until midnight).
The appartment is newly renovated and it has a modern look. It has 2 bedrooms and 2 bathrooms. It has everything you need. Automatical windowshilds. Airconditioning that also works for heating. Towels, shower gel, shampoo, drier. Well equipt kitchen.
The host is super nice and very communicative.
If you don't mind walking up to the 3rd floor, then this place is the best option for a vacation in Naples.