I didn't do the Buick deal but just wanted to say I've used Bonus Bucks many times and they are a great deal. I've bought Bonus Bucks certificates on Ebay a couple of times - they usually sell for about 20% of face value. So for $20 or so you can save $100 on each 2 days of your Marriott stay. There are also $50 certificates good at all the Marriott properties (Fairfield Inn, Courtyard, SpringHill Suites, etc.).