I tried one. Picked up a Stan Onnex and practiced with it for a while before deciding to hunt with it, which I 110% recommend. Found I shot equally as good with the thumb button as I do with my index.

I had one situation where it was knocked off my d-loop during a hunt while I was reaching for my bow. That one instance was enough for me to convert back. I am sure there are ways to mitigate that happening again, but being since I didn’t particularly see the benefit of the thumb over index, I reverted back.