I ordered free sample and called to cancel within 10 days because I was allergic to the product (teeth sensitivity). They insist on sending a link to consumer to cancel, however the link contains a clause that you must accept their terms, there is no place for comments and they include a veiled threat: "We take charge backs very seriously. All internet credit card companies’ use these databases to access credit risk with customers and future purchases with other internet companies might be denies. We do not have any control over... read full review »