You actually can't book while on board with points. We decided to reserve 3 cabins for next year while on our cruise this past week. We were able to book the 2 we wanted for cash but couldn't book the one on points while on board. Instead they give you a card explaining that you can book a cabin that sails within the next 14 months and receive a discount in points. You still have to call MS when you get home to book the cruise. Supposedly they will give you a discount in points if you sail within 14 months of your last cruise. Also, we were told that there was a change in the window for reserving a cruise. You used to have to be in your 11-month window to book. The rep that we talked to says that it is 14 months now. I hope so because I want to call on Tuesday for a May 15, 2004 cruise. If not I'm sure that waiting till June 15th will not be a major problem. We just want the cabins to be close to each other. Has anyone booked a cruise with the discount on points? How much was it?