Product review (5 stars): It Saved Me for Thanksgiving
Like most everyone else who ever needed one of these, I screwed up and forgot to put the arm back on after cleaning the drain.  I agonized whether this new version was the proper replacement for my model which is over 12 years old.  It turns out that my worry was unnecessary.  This worked perfectly.  In fact it has a better design and was about half the price.  It snaps in place - a feature that would solve the problem that some have encountered of the thing popping off by itself and getting fried on the heater.

Moreover, it arrived in time to was all my accumulated dishes when 9 new arrivals converged on my home.

2 pieces of advice:

1) When doing any dis-assembly, completely remove the pieces from the dishwasher.  Don't just lay them someplace convenient inside the thing.

2) Use the energy saving setting.  The dishes will still dry fine, you'll save on electricity and you'll do a good deed to the environment.