My opinion is no, it's not worth it, but someone else who won will say otherwise.
We found the show to be terrible and couldn't wait for it to be over. It's designed as a money-maker, pure and simple, just like Bingo, Deal Or No Deal and the pull-apart cards. The odds of winning are insanely low. Each round saw the highest point scorer get a water bottle and the overall highest points earner 'won' a $500 Effy gift card and the on-stage winner got to keep their game winnings in OBC, amounting to $465. I don't know for sure, but I'll bet it was non-refundable and, as it was day 6, they didn't have a lot of time left to spend it! When you consider the on-board markups, they were not really getting a lot. By that token, they sold a lot of cards, ranging from $25 for two, up to $50 for 10, so the whole thing really did come across like a money-making scheme.
As for entertainment value, there was little or none. I guess a more enigmatic Cruise DIrector (we had Roberto) would have improved the experience, but halfway through, my DW apologised to me for making me sit through it!