i feel like this would be a good opportunity for me to explain a bit of my experience with thumb releases so far. I am by no means an expert and quite honestly am limited in my experiences with thumb button releases. Ive tried a few different Truball thumb style releases, a carter chocolate addiction, a hot shot vapor and a hot shot eclipse. the way i see thumb release style aides there are 2 different categories that stick out to me.
the cheaper style ones, usually sub $100.
these ones usually have a pincer style clamp, you have to squeeze it slightly to clip onto your d loop, they do not lock shut. they are perfectly functional, and work pretty good. the downsides are that it doesnt have as much adjustment capability and that since it does not lock, you cant just hang it from your dloop while hunting, or you can but risk it being bumped off of it. in this case what i did was have a D snap shackle (
https://doublesteps.com/product/d-shape-plastic-snap-shackle/) and use the lanyard from the release to clip it into that, you can even leave the d snap open while hanging and it will stay on it.
$100+ ones have different style jaws depending on what one you get, but usually have a cocking mechanism in the back. you press the cocking mechanism, and close the jaws shut over your d loop, and they are locked shut, and will only open when the barrel is squeezed. they have more adjustability in the travel of the trigger, and most allow for different springs to be inserted to adjust how much pressure is needed to break and release the jaw. downsides to that are obviously cost, as they can be easily 2-3 times the cost of a cheaper one, and sometimes the fit of the release in your hand is ackward depending on the size of the release/hand.
Ill edit this to add some pictures to hopefully show what i mean a bit better
Hot Shot Vapor
Hot Shot Eclipse
Manual for Eclipse showing different adjustment settings