I have booked the April 10th eastern caribbean cruise on the Zaandam to celebrate my mothers 83rd birthday. I have a guaranteed cat bc verandah. My ta says that it is a good chance that I would be upgraded from the verandah deck to the navigation deck. What are peoples experience with upgrades. I have only cruised once about 12 years ago on The Big Red Boat, so I don't have much experience on cruises.