Book this place. Federica let us in and she is the loveliest host my girlfriend and I have talked to; incredibly helpful, friendly, and prompt. The location is very easy to get to from the docks or Napoli Centrale (15-20 minute walk max each way), a supermarket right next door, and right next to markets and bars. Aside from it being slightly hot (the fan makes for a good sleep), the place itself is lovely and cosy, with loving touches everywhere. Can't recommend enough.