I don't think anyone here is trying to claim they "know more" than the designers or try to prove that as their point. But we don't need to know more than them, we just have to know the intended purpose of the device......which we do. I don't think anyone here is trying to "downtalk" someone else's invention, but rather discuss the potential benefit of such a device. Just because someone produces a product, it doesn't mean everyone has to agree that it has a potential benefit and is worth a purchase. People can disagree about the potential benefit of a product, and they can voice this opinion. If you have such an issue with someone voicing their own opinion, whether you agree with it or not, then you have a long road of life ahead of you. Why is it hard to believe someone may have an opposing opinion? I would actually argue that SMD and his designer (Tony?) didn't come up with the idea, either. Or atleast, they weren't the first. I remember several years ago Chris (he goes by "thechris" or "thch" on the forums) had an identical idea and was actually in the design phase....don't know what ever came of it. It will take me a little bit to find all of the info though. Ah ha...Success! Notice the thread dates; over 5 years ago. http://www.caraudio....tting-tool.html http://www.caraudio....tting-tool.html I don't really see how testing a device such as this really has anything to do with influencing someone's opinion of it's usefulness and benefits. Someone can form an opinion on the usefulness of a device such as this without needing to see the LEDs lighting up. The concept is fairly easy to grasp, and it's the concept and benefits of use that are in disagreement. If you think it's a good product then great....buy it. But don't expect everyone to agree with you, and don't expect those who disagree to bit their tongues. Instead of coming in here just to complain because you don't like M5's opinion, why don't you try refuting his statements with valid reasons as to why you see benefit in such a product and actually contribute to the conversation.