Has anyone used it...

I have an ad for it here, which says..

The allergy-free way to wash your childs clothes!

A regular wash cycle can leave up to 50% of the detergent residue in your clothes even after intense rinsing!

Envirodisc is an environmentally friendly washing product that replaces harsh washing detergents and leaves no chemical or organic resiue. Envirodisc works by enhancing the cleaning properties of water without the need for detergents.
Envirodisc has antibacterial properties and is very economical to use.
Wash up to 700 loads.
Looks interesting, has a website, just curious to hear of anyone that has actually used it, known about it, know someone else who used it......