Product review (4 stars): Now if every user would see this ...
Wish it were thinner so I could mount it on the top edge of the door instead of on the front (vertical) surface.  This way it would be more obvious when one opened the dishwasher' door.  In my case there is little clearance between the top edge of the door and the underside of the counter.  An aid like this needs to be more conspicuous to be really effective, as folks tend to not remember to reset it unless it (figuratively) smacks them in the face.