This was a really good place to stay. Rafaelle was very welcoming and helpful on arrival, as was his mother who lives next door. Rafaelle made it clear that he would offer any assistance we needed throughout our stay. We really didn't need much, but it was good to know.
The apartment is clean, comfortable and well maintained. We were given plenty of clean towels, and offered extra cleaning if required. The entrance to the apartment is very well secured.
The location is an excellent base, a couple of minutes away from the main Circumvesuviana railway (for Herculaneaum, Pompeii & Sorrento), and just a few minutes away from Piazza Garibaldi Metro station.
The one negative thing I would have to say is that it not an especially attractive neighbourhood. In particular the local approach to refuse collection leaves much to be desired.
Having said that, we went for a drink and ate out locally every evening. At no time did we feel in any way harassed, threatened or unsafe.
If I were coming back to Naples, the first thing I'd do is check whether this place was available.