Product review (5 stars): Excellent solution
They were easy to install and the dishwasher feels very secure (it used to wobble every time we opened it).  I installed a weeks ago and they are holding well. The seller includes additional instructions and tips to help prevent common installation errors.

I am very happy with my purchase and would recommend them.

Update:
A few months have passed since installing the brackets and they continue to work well. I had to replace the connecting brackets that are part of the dishwasher because they cracked from all the bending done in the past everytime they came loose. I would suggest buying new dishwasher attachments instead of reusing the old ones.  The Granite Grabbers performed flawlessly.