Product review (5 stars): fantastic improvement to the wobbly adjusters
This is a fantastic improvement to the wobbly adjusters originally on our Whirlpool dishwasher. The top rack is much more stable now than it ever was, even when it was new. It would be worth the price and time to swap out the old  adjusters for this, even if they weren't broken.
The instruction sheet is not clear enough for your first installation, and not many people will do this more than once, but it's easy to find a video that makes everything clear and easy.