Giulia's place is awesome... Avoid taking a car anywherw near the place at all costs! Unless you too are in the "crazy driver" category!
The apartment is central and you can walk everywhere. Great restaurants all around and close to all of the best attractions in Napoli!
I'll be back one day and would definitely stay here again if it's available.
The apartment is quite spacious but the stairs up to the bedroom (loft) are steep and tight... If you're youngish and don't mind that then this place is a go.