Product review (5 stars): OEM part
Part was fairly easy to replace.  Easiest way (recommendation by an appliance technician) to replace - disconnect water supply and drain hose.  Pull the dishwasher out and turn 90 degrees and lay it on it's back.  That way you have great access.  Remove the drain pump assembly, disconnect the various leads to pump and sensor.  Pull the retaining shims from the pump motor assembly and remove through dishwasher.  Replace with new pump motor assembly in reverse order.  Apply a thin coat of vegetable oil around the rubber seal to assist in reassembly/position of water pump to apply shims back in place.