Lots of good info here, and I can only really add my experience with the CZ Kadet Kit as a training tool and plinker. I've had one for about 13 years, and always bring it to the range with my 75B, but I do use it on my 75D PCR as well. My wife will only shoot .22LR, so this is a good way for her to shoot a "service pistol" that I keep for home defense.
The Kadet Kit works great. It is reliable with bulk ammo, and just about anything I use, and very accurate. It rivals some of my Ruger MK II's, and that is saying a lot.