I just came to this forum to post almost the exact same thread about Cowboy Magic. I, too, finally bought some and I love it. Not only does it take out the matts and tangles, it leaves their coat so soft for days afterwards.
I thought I was going to have to shave my Molly down because of her coat texture, but now I don't.
I also bought it at a feed store. If you go to their site, you can find out where it is sold near you.