Review websites can be helpful, but you have to be careful when using them. It’s important to understand the key differences between how the Diamond Certified Resource (DCR) conducts research and how review sites collect reviews. While DCR exclusively conducts telephone surveys from an entire customer base of each rated company, review sites post reviews from any person who chooses to post, which means legitimate, spontaneous reviews are mixed with fake and cherry-picked reviews that come from a company’s best customers, family and friends. Due to the accuracy of its ratings, DCR is able to back your purchases from top rated companies with the Diamond Certified Performance Guarantee, while review sites do not. For these reasons, consumers are naturally encouraged to first look to top rated Diamond Certified companies whenever possible.