Casa Mavi, a spacious, clean and comfortable (if basic) apartment close to the National Archeological Museum, the Museo metro station and a very short walk to the Centro Storico, the heart of Naples. Good WiFi, great air conditioning, and lots of cafes within easy reach for your morning espresso and pastry.
It's an apartment in an old 'palace' style building, so entry is through a substantial wooden gate - a slightly temperamental lock on the pedestrian door aside - and it's easy to get into and out of, with a lift to take you and your luggage up to the third floor.
The location can be a bit noisy, but then you are in the centre of a major city so don't let that put you off.
The team behind Casa Mavi are friendly and super helpful - we'd happily go back and stay with them again.
Travel tip - from the airport, take the Alibus (€5) to the port, then hop on the metro at Municipio and take the train to Museo (€1.60).