Does anyone here use the stainless steel media in a tumbler?

This is a link I keep visiting thinking about it. I like that it's supposed to last darn near forever.

Stainless Steel Reloading Supplies | Tumblers, Seperators, Media & More!

This has got to be either the greatest thing that none of us know is as good as it is, or it's just expensive fluff...

So which is it???