Guido is a really good host with a lovely apartment in the edge of the Old City, not too far from the Train and Bus station.
Even if it apartment isn't in the middle of the hub, it's still walking distance to pretty much everything. For example a then minute walk to the best(and most famous) Margarita pizza in Napoli.
Guido couldn't be there himself, but he made sure that we had everything we needed and that we got to the apartment without any problem. His neighbor showed us around in the apartment, and was available if we had any questions.