This is an amazing apartment, the location is just perfect, it is cozy and quiet, I could totally see how it could've cost us double the price, but it didn't and that's awesome, too.
A couple warnings for a travelers - me and my wife we travel light, but if you have a lot of luggage you better be fit because the place does not have an elevator and the ladder is rather steep, so prepare to haul your luggage/stroller up to 2nd floor with your mighty hands. This, to be fair, applies to a lot of apartments in Naples, so if you are really about to bring a lot with you, be on the lookout for a luggage-friendly space.
We've also had quite some mosquito bites after a couple nights, so you better be prepared with some repellent.
Other than that it just doesn't get better than this. Just perfect experience.