Product review (5 stars): Excellent!
Simple, works perfectly.  Quiet.  We took out the old broken microwave fan unit and replace with only a fan.  Seldom use a microwave and just rolling with the husband's old college microwave on the counter.  If/when it breaks will go to the thrift store and buy another used one for $20.  So much better than the big expensive microwave fan units.  Could not be happier with the decision to do this!