We went with my wife for 4 days to Napoles. The apartment is in a really good place, you can easily reach the metro and the center. It was clean and Nina was really kind, tried to help in everything, also she wrote some advice for travel from the airport to the apartment and recomended restaurants and sihgtseeings at Napoles. One disadvantage, Im not tall but the stairs was little bit unconfortable for me.
I would recommend Nina and her apartment. Is a really good choice if you would like to go to Napoles for some days.