Gioacchino and Francesca's place is in the heart of Naples. It gives you the feeling of living amongts locals, however short your stay may be. The Duomo and the must see places in the historical centre are a few minutes away. If you are a good walker, you can even easily get there from the port (Ferrys from Capri, Sorrento, etc) in about 25 min.
The hosts are very helpful, I met Francesca during the check in and she was always willing to help. Communication was always very good.