Well, this is what you call five stars :)
First, Vito is a very friendly host, helping you with advice and staying in touch yet before you arrive, until you leave (obviously in a good sense, supportive).
Second, the apartment is also a big plus: the terrace, the equipment, the comfortable bed and the internet speed.
Finally, the location itself is a few minutes from the main touristic part of Napoli, ten minutes away from trendy cocktail bars and restaurants - we were out mostly in the evenings.
The area is typical with the noise of families living their lives in the neighbourhood, but without any traffic rush or anything like this - I would call it very quiet for the Italian standard ;)
One more word about the internet: with my wife we both travel and work (trying digital nomads lifestyle). It is important to have a good, fast and stable connection during our hours-long online conferences. And Vito has installed a broadband better than any other internet connection we had from Verona to Bari. If this is important to you - do not miss your chance!
BTW if - like us - you will a the "courage" to drive into the city, there is a 24h parking 50m away. they charge EUR 30 for a night stay and EUR 10 for washing. You would not use your car in Napoli, so it is worth to leave it somewhere safe.
Definitely recommended, and we would be happy returning, the next time we are in the city.