As usual, I booked my room using Marriott.com with a feeling of comfort knowing that Marriott would meet or beat other website's rates for their own rooms. Soon that comfort became a feeling of irritation as I looked for fun at Expedia.com. Amazingly, they had a lower rate. No worries, I simply completed a claim. The claim came back as 'denied' because one of the nights I had was lower than the rate from Expedia, but the other nights were not. On average, I was paying significantly more on my stay by using Marriott's website. I called the Elite line hoping that this matter would be quickly resolved. I spoke with a representative that connected me with her supervisor that stated she was a "Corporate Supervisor." I felt that my matter would be resolved; however, she stated she didn't know much about the program/claim process, couldn't help me, and then hung up on me. It was a very interesting response and performance from a supervisor. Therefore, as one would guess, the Best Rate Guarantee is truly a marketing ploy to have customers fall into a false sense of security. Buyer Beware--check all of the other websites to make sure you are getting a fair price. Most importantly, please avoid that helpful supervisor in your future interactions with Marriott.