We came quite later than expected, but Gennaro didn't have any problem with it. He was always on the line and available, even when we had problems finding the place, he tried his best to navigate us (successfully!). There is a small, nice restaurant with amazing pizza just 20m from the apartment, so don't worry, if you arrive at 9pm as we did, they will definitely serve you.
The place on it's own is small, but there is everything you need, the bed is comfortable and the view is just exceptional - definitely worth walking the stairs from the city center!
Gennaro also provided us with a list of things we should see and places he recommends for food and drinks and the few we tried were incredible, tasty and affordable.
There is not a single thing to complain about, the place is amazing, the owner even more and the city is just incredible. Definitely recommend!
Just a side note - the address was quite hard for us to find, so if you'll have any problem, I suggest you look up "Totò, Eduardo" restaurant and the apartment is just 20m from it.