Staying here might be the best if you travel Napoli just by yourself, with one friend, as a couple, or even with one kid.
Best location in a safety way, closed by the metro station, ferry port, as well as a very good supermarket which has absolutely everything and many customers.
And I felt like I finally got a place to stay without completely any probrem. （This place was the fourth place to stay in Italy in this trip. And there were always some big or small issues in the other places.）
Easy to find, smooth check in and out, stable shower pressure and water temperature, a few minutes to make the whole space warm in cold season, seems like a high security building with a brand new elevator, very quiet in the night. When I couldn't know how to use laundry machine, a lady next door, who the host asked to, came and told me how, immediately. They don't speak English well though, you probably understand them, and try to be nice to you.