Hey rgkeller, Normally when I'm afield, the rifle is in my hands. So the advantages of using the sling to actually "carry" the rifle only come in to play when I'm climbing into a Stand or when I have the rifle across my back while dragging Deer.
But, that third swivel stud would be a real problem for "my" back. I've tried the Ching at a couple of different Deer Classics, and that stud just won't get it for me.
I've also found that having a half twist in my regular sling and then slipping into the "Hasty Sling Position" is as fast for me and just as steady as the Ching method. Plus, I can use it from any position that I shoot from.
So, as you can see in the above posts, some folks like the Ching and some don't. If you can get to one of the Sporting Goods Shows in your area, chances are someone will have the Ching to show you.
Good hunting and clean 1-shot kills, Hot Core