Excellent apartment in good district of Napoli. Was perfect for our family with two children. Stylish and clean. And.. impressive math/philosophy library - I wish I could read Italian better.
Large cheap supermarket is in the next building, train station is 5 min walking and 10 mins to center. If you come by car, there is no free parking, but nearby garages will welcome you for EUR20 a day (typical for all Italian cities).
Hint - if you walk uphill and towards the center on feet, you will see genuine and impressive Napoli architecture no tourist guide will ever show.