Product review (5 stars): Work great....so far.
These are great.  So glad I found them as my dishwasher can't be secured on the sides and I really did not want to drill into my granite.  These were easy to install and are, so far, holding great.  Perfect solution.

I just positioned my dishwasher exactly as I wanted it, the "dry" placed the brackets so they lined up with the screw holes and then traced the brackets on the underside of the granite with a sharpie.  Then I had my wife hold the dishwasher bracket out of the way while I stuck the granite grabbers to the counter using the sharpie outline as a guide.  For my setup, this was by far the easiest way.

The instructions tell you to pull your dishwasher out and mount the grabbers to the dishwasher brackets first, then push it back in, the peel the backing off and stick 'em.  That would not work in my case because there was no room between the dishwasher bracket and the counter.  In fact, I had to bend the dishwasher brackets downward a little bit to accommodate the granite grabbers.  Door still shuts fine.

Let's see how long they last!  Honestly though, even if they only last a year, I would still rather replace these every year than drill into my granite!