Product review (5 stars): just like the original
This replacement part is a Whirlpool part, just like the original. Once you take the basket out (by removing the clips at the end of the roller that hold it in) it was relatively easy to figure out how to remove and replace it. The top clip comes of first. Take some time with the twisty removal so that you can do the twisty replacement by reversing the removal twist.

Others have said they bought more than one of these just in case. That's not necessary because the replacement part is shipped quickly, and you don't need more stuff lying around in your house that you might never use. When the original tab weakened so that it wouldn't snap back, I kept it in place with a wire bread tie while waiting for the replacement to arrive.

From the product name, I was a bit worried that the package might only contain the wheel and not the whole roller assembly. It does contain the whole assembly and twists onto the basket for replacement. The part number matches the roller assembly part number and the picture is of the entire assembly, which is what you get. There is a wheel part that attaches to the dishwasher body. That's a different part.

So: it's the right part, it's shipped quickly, and replacement isn't overly complex. If you need one, this supplier is AOK. The only problem was with the product description: It's actually the Roller Assembly, not just the Upper Wheel. What you see in the picture IS what you get.