Unfortunately we were not able to use the tickets. We arrived at 12:30 PM. The line to redeem our voucher was out the door and down the stairs. By the time we reached the ticketing desk (1:30 or so), they were issuing tickets for 4:00 departure and the line to turn around and come down was an hour long, the last tram down. If we had purchased directly, we would have received a voucher to use at another time, but no such luck with this purchase. With parking, we were out $75.00.