The apartment is in a stunning palazzo right in the middle of the old historic town, thus ideally situated for visiting! The stairs are high and tiring but well worth it, as the place itself has ample space, it is tastefully decorated and spotlessly clean.
There are several really nice restaurants around (Tandem and Mattozzi in particular for local food) and cheap yummy pizza literally across the street!
I would definitely recommend staying there if in Naples.