I'll be arriving at Napoli Centrale and was initially planning on taking the Circumvesuviana to Sorrento. Now I'm having second thoughts and considering the Curreri bus from the airport. Based on what I read so far, there was no advanced booking of this bus until a year or two ago, but now there is. I don't plan to book it beforehand, though, as I may change my mind or something else unforeseeable may happen. It's not expensive, but I may already have to waste one prebooked ticket and it adds up after all.
So, I was wondering if anybody has found the bus full recently due to prior reservations. I'm not going to count on the last bus for the day, but it'd be still unpleasant. I'd appreciate your input.