I have the Tru-ball Extreme with Talon head.
It is simular the the chappy boss.
They do work and will help some when it comes to target panic.
The best thing I would suggest is when you get one is to blind bale so you can feel the release go off.
I usually start my practice sessons of with blind baleing my first 5 shots.
Also keep your thumg pointing towards the ground as you draw when you come to anchor and have sighted wrap your thumb so you are touching your index finger then squeeze your shoulder blades together.

Aussie by birth Texan by choice