I don't know if this is the "typical Mergellina flat" but if it's true I want to be a Mergelliner(?) because it's spectacular. High ceilings, big window, more space than you'd ever need that's filled with all kings of art and books.
It's close to the sea and the area itself is less busy (which some would find preferable to the chaos that is central Napoli) but still has plenty of places to go out to and a decent amount of local establishments.