Just picked up a conversion kit for my SIG. At this point, it's about learning to see the sights lift and then learning to call shots.
Im Not sure why I have more ego on the line when I'm shooting center figure, but it is a factor. At any rate, I'm more relaxed shooting .22 and therefore, according to my novice hypothesis, more likely to see front sight lift. I blew through over a thousand rounds of 9mm and never saw the sight lift once. By the end of my first day under the .22, I was seeing it lift consistently. I closed out the session with 9, and was still seeing it lift.
I don't know how it helps with grip, stance or manipulations. I don't really care. Even if all it does is help me develop the ability to call shots, I'll consider it an opportunity cost bargain.
Cheers,
D