I bought a combo for the group, but the way it was worded on the app made us misunderstand. The combo was buy 4, get 1 free, so I understood that if I bought 4 tickets, I would get 1 free, and that would be enough for our group of 5. But when we got to the pier, the staff said that buying 4 tickets already included the free ticket, and we had to buy another ticket at the pier to have enough. That made us a little late. Luckily, we finally got on the boat.