The flat is in an ideal location in the old town and Vincenzo is a great host; really friendly and has lots of helpful information about the area. He made us feel very welcome in his home but also gave us plenty of space and privacy.
We loved our stay, but everyone is different, so it is worth knowing the following things:
The bathroom is not en suite but it is just opposite the bedroom and private to you. Also, I can imagine that the weak wifi in the room could be a problem for some guests, and for others the long climb up the stairs to the apartment could be challenging. But, if like us, these things don't bother you, then Enzo's place is the perfect affordable base to get out and explore Napoli.