We stayed in Valerio's apartment as a couple for five days (I was here for business), and got everything we needed. Valerio is very reactive to any message, he's helpful and very nice.
Valerio's apartment is in the heights of Naples, the view is wonderful, just as the pictures would let you imagine. The apartment is very clean and convenient.
The apartment is in a part of the city that is pretty quiet, yet still very close to the center / Toledo. There is a small grocery near the entrance of the building where you can find anything you would need for a stay. There are excellent restaurants / pizzeria nearby.
We enjoyed our stay in Valerio's apartment, and I would probably come back if I have to go to Naples again.