Great location really downtown Napoli, where you get to experience everything about daily life. Of course, it is crowded, but that is just part of it. From the location, you can reach all the sights on foot. The station of the "funiculare" - cable car train - is just around the corner, to go up the mountain for a fantastic view of the city. Then go down the 440 steps.
The flat is well furnished and equipped with the necessary necessities. Small supermarkets are on the same street, a slightly larger one is a 15-minute walk away.
Enjoy it!