I don't use their guarantee often, just two times in the past. I tried to compare a Comfort Inn in London with agoda.com. Agoda rate is 10 GBP less than choicehotels.com, room types and cancelation policy is exactly the same. But Choice replied that the hotel offer free wifi when I book direct on their site, while they charge guests which book on different websites. Is that a joke? So it's just impossible to find a third party website with a lower rate if the hotel always have this policy.
