Product review (1 stars): UPDATE - THEY CAME OFF AFTER JUST A FEW MONTHS
***UPDATE 2015.08 *** It's been months and Kraydad's Cables and Parts has yet to respond with either replacements or a reimbursement.

***UPDATE 2015.05 *** They have both come off. Was working fine for a few months.  I am going to see if the company can send me two new ones or get my money back. Re-rated this as disappointed.

***Initial Purchase 2015.01 *** Worked very well.  Had them on now for a few months. The key is to make sure you clean the surface with alcohol and to hold them in place for 20-30 minutes. According to the instructions, do not clamp them for over an hour.
Also, they are used to keep the dishwasher in place.  They are NOT to be expected to hold UP a dishwasher. There should be very little downward pressure or pull from the dishwasher clamps.  These are perfect if you just need to hold the dishwasher in place and keep it from scooting!