We stayed in Nunzia’s place for three nights in June. We didn’t get to meet Nunzia, but we were greeted on arrival by her neighbour who helped us in. The area is great - a stone’s throw from amazing pizza (L’Antica Pizzeria da Michele, and Sorbillo - well worth the queues), pastries (the cannoli and sfogliatelle at Capparelli were amazing) and public transport (Cavour station).
The flat is comfortable and clean, and the firm mattress surprisingly great for sleeping. It’s great that it’s on the ground floor - no luggage issues, though the bedroom is upstairs. Would recommend this place to anyone wanting to visit Naples.