I'm currently prepping for the Diamond Challenge, and will utilize the points + cash option for most of my stay. There is a promotion going on right now for 20~40% bonus GP points. I also have enough points I can transfer from UR for a few stays. I was wondering if it make more sense to buy GP (hence saving UR pts for later), or just use UR points? Maybe it's a no-brainer, but thought I'd ask. Thanks!