My mother in law was involved in a car accident with an older women whom this product could of helped. My mother in law was walking through a parking lot with her daughter when from out of nowhere a car was thrown into reverse and struck my mother in law and dragged her for forty yards before pinning her against a brick wall. As a result she spent a week in the ICU and now suffers from short term memory loss and severe back and leg pain. The cause of this accident was the woman in the car who swore she pressing the brake and the car went by itself, however nothing was mechanically wrong with her vehicle. Maybe if she had a test this entire accident could have been avoided.