I just used the B1G1 coupon at the Marriott Boston Copley.. They note your MR account in their system that you have used your the one you are entitled to.. I did use the B1G1 feature at one of the hotel restaurants without problem.. Even though the day I checked in I was using points for that nite, I did receive my platinum arrival gift and due to the long wait at the check-in counter, they instructed me to make 2 choices on my arrival gift card.. Rooms have the new beds and bedding.. VERY NICE!!