I really liked my stay at Rosaria's place - both the room and the available bathrooms were very clean, and a communal (also very clean!) fridge was available in the shared space. A gas stove in the kitchen can be used for breakfast prep and cutlery and cups / plates were provided. A large loggia is also available for access. The apartment is a stone's throw from the Linea 1 Materdei metro stop - commuting to and fro the centre is a breeze, unless one forgets the metro cut-off time of 11pm. Getting there on foot at night is an uphill hike! )
I had very good communication with Rosaria who arranged for the stay to be comfortable and smooth. Grazie mille, and I will be returning when in Napoli! : -)