That still won't prove anything. The only way to test your jaw against someone who doesn't use Rock Jaw would be for you two to take punches of equal force on the same spot and analyze the damage. But even if your jaw held up better, it would be difficult to prove that using Rock Jaw caused you to take less damage because so many other factors could be at play. Another option would be to take a punch on the jaw now and analyze the data, then run the same test again after a significant amount of time using Rock Jaw and comparing the two. Again, my suggestion to run scientific tests was not "hate". As a businessman/salesman, you have to consider the consumer's point of view. As a potential customer, some of the things that I consider before deciding to buy a fitness related product are:* a) Is it there concrete evidence that it works* b) Can I make something similar myself? When it comes to Rock Jaw, a) No and b) Yes. Until I can answer yes to a) and no to b), I will never consider buying Rock Jaw, even though b) is the bigger factor of the two in this particular situation. The only boxing-related products I've bought so far include headgear, gloves, hand wraps, mouth piece, shoes, and a resistance band for shadow boxing. I think these products are more cut and dry when it comes to the "common sense" of their effectiveness, but more importantly, I can't make anything similar myself.* If you're seeing sales increase, good for you. More power to you. But I think your business could do much better if you stay open to constructive criticism/suggestions and use negative feedback to think of ways to improve your product, rather than being defensive and insulting.* What you posted earlier about new ideas having 50% haters and 50% lovers may be true, but the way you're handling the "haters" in your recent posts makes you look like a 100% douche bag.