I run a Glock 19 in IDPA and a Glock 19 frame with an Advantage Arms .22 kit as my Speed Steel gun, I like having the same frame, trigger pull, reset etc, I find it works well for me. Yes it's true, you will never replicate the recoil of a 9mm with the .22, but the similarities make me a more confident shooter because I spend all my time on the same platform