RE: Thumb style releases?
Like I said, I've been shooting one at work for quite awhile now and I really like it. My anchor hasn't changed as I never developed one that incorporated the "bone on bone" theory. As long as the string touches the tip of my nose and my peep is lined up with my sight housing, I'm golden.
I don't mind spending the money now on a quality release; I've learned that its better to make the initial investment instead of going cheap early only to be unsatisfied in the long run. We've got several cheaper models as well, but I really dislike the way they feel.