I can only recommend staying at Giuseppe's Blue House. It is located next to university just short walking distance from the harbour, where you can take the alibus from the airport or the ferries to procida, and almost in the center of the old town. There are many good cafes, late night bars and shops, thrift stores, restaurants and a supermarket nearby, yet the room is quiet and you do not hear much noise from outside. The location is a big plus for the apartment. We can especially recommend the supermarket, where they are happy to make sandwiches for you at the counter, and the taverna dell'Arte, a great hidden restaurant just around the corner (reservation recommended!)
The room is as advertised: there is a bed, a table, some cupboards, a kitchen, a restroom and an airconditioner. We especially enjoyed the nice, modern shower, the clean room and the different lamps which offer the best lighting for any situation. The room has a nice atmosphere with its white and blue tiles as well as the pictures of the amalfi coast, napoli and procida.
The apartment can be a bit hard to find when you arrive for the first time, but Giuseppe always answers messages promptly and politely and was happy to pick us up at the street and show us to our room. Giuseppe was happy to give us some recommendations for food and sights in napoli and also left us his number so we could always contact him. Again, contact with him was always good, quick and easy, a great plus for booking with him.
All in all, we can recommend booking with Giuseppe, especially regarding the fair pricing of his apartment. Thank you, Giuseppe, for having us!