I hated Naples. There was trash everywhere. People were sketchy. The train station was on a bad side of town. Unfortunately I went on a Sunday and everything was closed. I couldn't even get a pizza. I needed to take a team, but the machine at the tram stop was out of order and the only place to get a ticket was at a Tabacchi, but ALL of them were closed. So I had to take a taxi for an expensive 10€ to go just a km or two. Traveling as a single woman in Naples was the worst experience.
Insider Tip:Don't go on a Sunday and don't go alone at night.