I find the Hans system to be very unconfrontable for the little bit that I have worn it. I wear it becuase it is what I have available to me. Dave now will not run without it. We bought the HANS device becasue of it's known reliability and we figured that if it is good enough for Pro racing all around the world it is good enough for us. (not defending that this is a logical way you make your decision) There video.. shows the hans failing becasue of the belt slipping off. and was loose enough to fall over the persons shoulder. I would like to see a similiar test with the proper belts and correct tension and see how the number compare then.