<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by stevet954:
...what is to prevent someone from staying at a Hampton for 5+ nights, and ...invoking the 100% guarantee?
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It's not completely open-ended. I recall fine print (it's not in front of me) that says you have to bring your dissatisfaction to the attention of hotel management and give them a chance to satisfy you. Only then can you claim that they were unable to resolve the issue to your satisfaction and claim the free stay.