Product review (5 stars): They Grab!
As others have mentioned, this product is great.  Make sure you have several clamps handy that are large enough to go around the countertop and reach the granite grabbers.  I used 4 welding clamps and they worked very well.  I left the grabbers clamped longer than the minimum recommended time since no one was in the house.  We've used the dishwasher for about a week now and the grabbers do not show any signs of early failure.  I wish I knew about these a year ago when the original glue the installer used had failed.  Great product, super fast shipping, very reasonable cost - what's not to like if you need these?