Whatever you do... Avoid Naples!
You have been warned!
In my totally honest opinion which I wrote in another thread, it is the most horrible, dangerous, frightening city I have been in - and fwiw I've been around a fair bit in the last forty years.
Mogadishu is said to be worse...
I just got back from Naples three weeks ago and I remember reading bad things about Naples on this site and I am happy I did not believe everything I read because I fell in love with the city, the energy, the crazy atmosphere, i never felt in danger or afraid. It's a big city, yeah it's dirty, it's loud, but people are nice in general, the food is good and the there is action everywhere, it's not a bike friendly city but it's not a horrible, dangerous, frightening city.
Paul