Our stay in Napoli was PERFECT: the apartment's location is amazing, in a quiet street with little passage but just a street or two away from very lively and interesting sights. We walked the whole time there, no need for buses or metros, from the apartment to Capodimonte then castel dell'ovo in very reasonable time (30min tops each time) honestly couldn't ask for a better spot! Not to mention the apartment is very cute, exactly as advertised, just what you need when visiting, with the advantages of a 4point locked door, multiple beds, air conditioning and functioning wifi.
Finally Stefano is a great(!) host, very sweet and welcoming, gave us some awesome tips and made our last day all that much better having us discover some of Napoli's treasures. I can't wait to go back and will definitely recommend him to everyone I know. :-)