I've been running pcc for a few months now. I'm not super serious.....mostly took the plunge for the fun and can run it on a moments notice without having to hit the range prior for a different pistol like I normally would. My take away is that if you have a carbine, say in .223/7.62 it way helps your weapon handling skills, especially in tight quarters. And just like in the handgun game, it will let you know where your carbine skills are weak in CQB type stuff. So if you 2-gun, just want to have fun, or sharpen potentially real life skills, do it.