The appartement and the host are very good!
The location is good if you want to travel to Pompeii/Sorrento/Ercolano/Vesuvius.
But if to go to the city better take a subway which is very close to the appartement (I dont recommend to walk through that area of Napoli).
But we had a very nice stay! Only at night people in the building can be loud, but I guess it is because they are Italians!