The apartment is small but well-equipped, perfect for two people (even three if someone is comfortable with sleeping on the couch). The Materdei metro station is near, and bus transportation is fairly good even at night (although the city center is only 20 minutes on foot). The neighborhood gives you the true Napoli experience but at the same time it's safe.
Our host, Gino was friendly, helpful and flexible, gave us clear instructions, and was always available via text messages.