Has anyone redeemed MyPoints for Vacation Miles Awards for Marriott? You can get a $50 award toward accomodations for 2,500 MyPoints, but I want to know how this works. Do you get a certificate that you can just present when paying your bill at a Marriott or do you have to indicate when making a reservation that you will be using this or what? If anyone has done this or has knowledge of how it works I would really appreciate it. Thanks.