The Hampton Inn website (and in hotel advertising) states:
"Your 100% satisfaction is guaranteed. If you’re not totally satisfied with your stay, you’re not expected to pay."
http://www.hamptoninn.com/en/hp/brand/about.jhtml

Short story:
I stayed at a Hampton Inn in Dallas for 12 nights. We had agreed to a certain price per night before the stay, but was incorrectly billed upon checkout. While we were their, we tried to get the bill adjusted several times. We also had several problems with the staff (many were basically incompetent: I am a HH Diamond, I know what to expect at all levels of Hiltons). Example: The first night we were their, a "very strange" odor was present in the room, and because they took over three hours to respond and move us to a new room, they credited us for the first night immediately.

Upon checkout, we tried to get the billing error resolved and to have at least 1 more night credited because of the numerous problems, but both the manager/assistant manager were "not available" (red flag!)

After three months of messages (including disputing with Diners club - but since there is not 'supporting documentation' Diners did nothing, and I did not pursue through Diners); the manager calls back (only after we call Hilton corporate), and the manager claims that they never agreed to the reduced rate, and that the 100% guarantee can only be used for one night.

Does anyone have any experience, or first hand knowledge of what the limitations are to the 100% guarantee?

Since their advertising mentions nothing regarding limitations to the guarantee, are they not legally viable to honor claim of less than 100% satisfaction?

thanks.