I saw that product in their catalog too. They advertise it as a carbon/crud buster, not a copper buster. Their theory is that for years everyone's been wigging over getting the copper out, but carbon's been getting the short shrift. They maintain that fouling is essentially multiple layers of crud -- barrel steel, copper, carbon, more copper, more crabon, more copper, more carbon, etc. It's the carbon that traps the copper underneath, so to get to it you gotta attack the carbon first.
Interesting theory, I'm not saying they are wrong, but there are tons of good cleaners out there. Still, if you use this product, you probably should follow up with something like Butch's or Sweets to get the copper.
I still think plain old FP-10 or some Ed's Red, first on a patch followed by bronze brushing takes care of carbon very nicely. Ed's Red has some issues with using proper ventilation, but make up a gallon of it and store it in an empty paint can, it has many uses for firearms parts cleaning as well as other small parts (tools, auto parts, etc.). Plus the price is right. I might not feel this way if I had to deal with it every day of my life but using it as infrequently as I do, I think it's all you need.