This was a great find.
The space is really unique, a little quirky and much larger than I thought it would be. The view is so stunning that it took me a good half hour to stop looking out the windows and explore the apartment :)
In terms of location, it's really close to two met stops and lots of small grocery shops. There is a great pizza place nearby which is super tasty (thanks Ros for the recommendation!).
Sal and Ros are lovely hosts - going so far as to drop us off at the airport for a 4am check in!
The only thing I would advise other travellers is, given the age of the building, the lift only fits three people. If, like me, you are scared of small spaces, you'll need to be fine with climbing four flights of stars - or just close your eyes and prey like I did :)
If I find myself in Naples again I'll certainly be seeing if this place is free.
Thanks again for a fantastic stay!