Product review (5 stars): Anchors the dishwasher securely
My new granite counter top had a lot of powder residue on the backside where these mount, and I did not do a sufficient job of removing it before applying the adhesive strips provided with the brackets.  As a result, they fell off the next morning when the clamps were removed.  I emailed the company and they sent me instructions detailing how to remove the failed adhesive strips and use epoxy to fasten the brackets to the underside of the counter top.  This time I used acetone to clean the surface and waited an hour after cleaning before attaching the brackets with epoxy and clamps overnight.  It has been almost two months since the installation, and they are still attached firmly.  In my opinion, the brackets are a better option than drilling into the granite and using screws to secure the dishwasher.  Based on the difficulty to remove the failed adhesive strips from the brackets, I feel that if I had properly cleaned the powder residue the strips would have worked fine.