Product review (2 stars): Not so much
I bought this as a replacement for the exact same device that my granite counter top guy provided to me to finish the dishwasher install.  It only stayed adhered to the underside of the counter for ~60 days.  Both in the case of the "gratis" pair of "grabbers" that the installer provided and the pair that I bought here on Amazon.  The second pair lasted about the same amount of time - aprox. 60 days.

The second time around we became fastidious about placing heavier items (anything glass or pyrex) on the lower shelf and at the rear of the dishwasher.  My thought that Archimedes was NOT our friend and that I was being unreasonable in placing anything in the dishwasher anywhere that space permitted.

After the second failure I decided to go with an all together different style.  4 screws into the cabinets on either side.  Industrial adhesive to the underside of the counter.  Quite a bit more involved on the install, but trivial in comparison to the dishwasher popping out of it's little spot when ever a casserole dish goes on the upper shelf.

Like another reviewer, I replaced these with the "E-Z Dishwasher Bracket" by EZBracket.  So far no drama with that piece.  I wish I had gone with that in the first place.