@2channel8 - exactly. I think there are many products that could very well do what they claim, but seemingly exorbitant prices make many people sceptical and many outright hostile.
My solution is to DIY and, if I notice an improvement, then I MAY consider a commercially available product.
@randy-11 - why? Why do you spend so much time knocking products and making absolute claims about things that you don't seem to actually understand? Insulation on cable increases capacitance, which stores and releases a charge. It's not a stretch theoretically that this stored and released charge in a signal cable could mess with the time alignment of the signal, thereby 'smearing' it. And it's equally plausible that anything the wire insulation is in contact with could further affect the capacitance of the cable.
While these effects would be incredibly small, there's no reason to assume that no one could hear them. Also, if indeed there was no scientific basis for something, that doesn't immediately imply that it is impossible. Data suggesting something doesn't work, however, would be a valid reason to suggest something doesn't work.
Right now though, you come across as an anti tweak fundamentalist. I'm curious if you've tried cable elevators or if this is just another thing that you've decided can't possibly work and must save us from.
I wonder, is it tweaks you have issues with, or it is it the high prices that disgust you, tainting the product in your mind?