Dario’s place was not bad. We never met him, but instead met his father who gave us keys and gave us a mini-tour. We were never asked for passports or any kind of ID.
It’s a small place, and the terrace is beautiful but the view isn’t so much. Location was accurate, but I hadn’t done research on the Mercato area prior to booking. It’s close to Napoli Centrale but far from Centro Storico (the city center). Clean rooms and bathroom. Modern kitchen. Comfy bed/pillows and large storage places in the armoire.