Thanks, Ngaire. It seems to me that advertising 50% off would sound more attractive, but maybe that's just my solo traveler mindset, as I see 2-for-1 and figure there's no bargain there for me. The onboard booking policy sounds like it was borrowed from airline pricing policies. That, of course, is not a compliment. But it does sound like you get all the benefits of an open booking by booking a specific cruise and just changing your mind later.