We stayed in the apartment for 2 nights. It is a great base to explore the city. It is located in the historical center, very close to Duomo di San Gennaro. It is spacious, very clean and renovated with good taste, modern and classical at a same time.
Checkin was perfect, being able to drop our luggage before 3:00 pm allowed us to travel light to Pompei where we had a tour booked that afternoon.
Vincenzo was a great host, very accomodating, very helpful and easy to reach at all time.
I would definitely recommend booking this apartment if you want to visit Napoli.