There was some confusion from AirBnB about us adding an extra night to our visit before arriving, but Paola was communicative throughout and made sure everything was sorted out for us. She sent through detailed and useful instructions for reaching the apartment, and also provided recommendations of restaurants, bars, etc.
The apartment is an independent space, but connected to her place through locked interior doors. The entrance room is large and spacious, as is the bedroom. However, from the hallway and entrance room, you can sort of hear conversations through the wall/interior door. This is fine form the bedroom, though, and doesn't disturb you. The apartment was clean and tidy and the bed was the comfiest we stayed in during our trip!
The apartment is located atop a large hill, right beside Castel Sant'Elmo. Just stepping outside gives a wonderful view over Naples. However, it is a relatively long walk up/down hill to the city centre, but the metro and funicular are relatively close. Young people gather by the viewpoint at the Castel in the evenings, and it can be quite noisy outside on the weekends. The wifi in the bedroom is a little weak, as Paola says, but I was still able to connect.
Overall, for the price this is a great space to stay, particularly if you want your own space. Paola is very friendly and helpful. I would happily recommend this apartment.