Ciro has a great place very central in Napoli (5 min. from the central station). He provides you with a lot of snacks and information. The place had a strong air conditioning and a nice terrace (be careful with the door though, we almost locked ourselves out), which was both very needed in the heat of Napoli.
a tipp: Da Michele (a michelin star - pizzeria) is less than 5 minutes away from his place and more than worth trying!
We would come back!