I stayed a week at Mauro's flat. Mauro was very responsive before I made it to Napoli but was not welcoming and did not give me any instructions regarding the flat when I arrived which was a bit of a lay down. I loved the area, Spanish district, but it is at the centre of Napoli life and noisy. The flat is small, rather clean, well decorated and ok equipped but it is not cosy: the bed is not comfortable, bed linen clean but there is no real blanket and even in April nights can be chilly, there is a sewer smell coming from the tiny bathroom and do bring an excellent set of earplugs or you will not get any sleep with the noise coming from the cars and Vespas going up hill on the cobbled street.
I loved being in Napoli and was grateful for having a place to stay but I would not recommend Mauro's flat.