For $70 does this provide your car any real protection or is this just like the snake oil they used to sell like rustproofing the undercarriage or glass etching. I think for $300 there was something of value they might have come up with but for $70, which means the real cost is about $15, I can't imagine this is anything more than a bumper sticker. You folks that got this either because you wanted it or it was just on the vehicle, does it have any real value?