In has been around for many years and never hear much about it in the last 3+ years. Miracle mud much like Zeovit has been under controversy since it's existance.
IMO: If it were that good, it would have caught on by now and wouldn't need an add to sell, it would sell itself. I never bought the notion myself but that doesn't mean it can't work but I'm sure the ingredients in the mud is not the only thing to attribute to success. Public aquariums, I bet many of them pump in saltwater from the ocean and probably never bother to mention that in the add....