Product review (5 stars): Easiest appliance repair ever!
I opened the dishwasher one day to find this part sitting on top of my clean glasses.  I was able to determine it was the "upper spray arm" from the manual.  Searching for that and the dishwasher model number brought me here.  It is the correct part, it was easy to install, and my dishwasher is back up and running the day after I ordered the part--and I placed the order on a Sunday)!  If only everything in life were this easy!