It is easier to believe a person who has tried a product than a person who has not. I have read the technical paper prior to purchasing it and I was skeptical. But, after going to Smart Madness, they installed it on my car with my choice of returning it. Of course, I drove it for a few miles and never took it off. some people claim you can just get the same response by flooring it. I've tried that and it is not possible.