Antonio's son, Mario, was our host during our stay. Mario was a fantastic host - his communication (speed and content) was excellent and he was helpful in answering questions throughout our stay, in giving recommendations, and in helping us to book a taxi to the airport. We really appreciated his flexibility with check-in too.
The apartment itself is in a great location for exploring Naples. Its about 10 minutes walk to the nearest metro stations and many attractions and good food places are within a short walking distance. The shower is good and the bed is comfortable. It is remarkably quiet too for an apartment that is so central, although you might want to pack some ear plugs if you're a very light sleeper/usually live in the countryside as you can hear pipes and people moving around in other parts of the building during the night (I think you'd get this anywhere though!). There are lots of stairs to the apartment, though this helps burn off the pizza!
Overall we really enjoyed our stay and would definitely stay in this apartment again! :)