I just saw today that the half off offer will be around until Oct 1. We are cruising Sept 1 and while we weren't planning to rebook due to $$, that half off offer may change things. I know we will pay it later, but I love the idea of tying up less money now. So...has anyone done the half off booking deposit while on board? And, if I put down a deposit for a 3 or 4 day cruise, and then in the future change it to a 7 day, will I then half to pay the difference in deposit, or will it just be a larger payoff at the end? Thanks!