The upper spray arm assembly on my 15-year old dishwasher broke. I found the parts easily and the exploding diagrams that were shown were helpful to make sure I was identifying the correct part. It took about 10 minutes to fix, including time to figure out how to pull the top rack out. The seals were purchased to replace the existing ones, one with some cracking and the other sort of warped.
The parts came in two days, not the week that was stated.
I was happy.