Product review (5 stars): Restores the spray force and distribution in your dishwasher -- super easy to install!
The part was less expensive on Amazon than many other sources I checked, plus, I know Amazon backs its customers who want to return.  I was concerned that the instructions might be missing or unclear, or require tools I don't own.  WRONG! The instructions were super easy. The replacement took less than 10 minutes, and I loved my dishwasher once again!