It is offensive to see products that have a very low cost to create (bet this one does!), and that make grandiose claims that lack any objective testing or evidence whatsoever, and that charge stupid-money prices for it. I'm not saying you should not by it. I am saying that unless the connections on your system cabling are extremely oxidized, dirty, or loose what you will hear will be far more placebo effect than miracle audio tweak IMO.
That said, MillerCarbon has been using many different kinds of tweaks for ages and swears by many of them. Maybe it does somehow all add up?
I have tried other cable connection enhancer products over the years with little to no impact on the sound-- but I'm already using good cabling, have clean connections, and very high resolution components in my system that should be revealing-- yet I just don't hear it.
What I do hear are the tweaks I've applied to reduce vibrations, and sound absorption panels that reduce reflections in the room. Basic stuff.
Does this product come with a full money-back guarantee? It darn-well should!