Got my trial rag in the mail a few days back. Last friday I believe.
Tried it out on some simple things, wiping down blades. That sort of thing. First thing I noticed was that normal silicon rags leave little bit and pieces, while the rusty rags wool rag picks these up, leaving no little bits on the blade. +1 for rusty rags.
But where this product really shines is checkering. or similar parts of a gun. gets in the cracks well and puts a nice even protective layer. that isn't slimey or slick like thicker silicone treatment rags. So the wood (or plastic ) stays grippy.
Also found a great use for the rusty rag as well, since it picks up lint and such so well, you can cut a thin strip from the rag 1/4" or smaller, and clean the inside pocket of knives out with it. get's all the gunk and pocket fuzz out. use a toothpick to push it around, and nothing is left behind.
Great idea, well executed. And a good price considering you are getting a leather backed rag, that should last forever.
Think I already need more though. Can never remember if it's by my guns, or around my knives.