The apartment is really stylish and in an old, chic block in central Naples near the Centro Historico. We were met on arrival and gifted some of the owner's handmade limoncello which was a lovely touch of hospitality.
The apartment is only 250m away from Piazza Cavour station where you can get a train to Naples Centrale/Herculaneum/Vesuvius and Pompeii. There's even a quick train to Rome!