I use my fingers. Quiet. Accurate enough to hit a tennis ball most every time at 30 yards (without sights, by the way). Dependable. And, best of all, I have never once dropped 'em out of a treestand! Well, not yet anyway.
IF I used a release, I'd use a hand model, like the Carter Hunter, instead of a wriststrap. With a wriststrap release, I get the weirdest feeling, like my hands are tied together by the bow. It's almost claustrophobic. I can handle it shooting targets. Can't stand it when I'm hunting though!