I looked into trying it last year and I decided against it because there are much cheaper methods that can be applied that basically do the same thing, like vodka, amino acids, adding magnesium, etc. Any company that has you put additives in the tank but cannot explain how it works really bugged me as well.
I have also noticed that less and less places are selling it these days which should also tell you something. I don't know of any local stores that carry their full line of supplements.