I switched to a thumb release a few years ago, after shooting a wrist release for 20+ years.
I'll never go back.
Cheap thumb releases are just that, cheap. They feel cheap, and they work cheap (but they do work).
I started out with an inexpensive TruFire, and it worked pretty good. Then I ponied up for a Carter, and it has been amazing. I have medium sized hands and my Big Kid (now called a Target 4+) fits perfect. I also have a Scott Longhorn hinge release that I use for target shooting.
I see a lot of people doing funny things with thumb releases; twisting their hand so the back of their hand is on their cheek, buying too darn big of a release, using their thumb to activate the release (hint: your thumb should not move).
I recommend getting fitted for one, and a lesson on how to shoot it so you can realize its full potential.
“I went to the woods because I wished to live deliberately...”
Henry David Thoreau