I'm not sure what happened in Mr. Green's class, but I've only seen two CZ pistols that needed work. One had a bad extractor spring, and the other shipped with a bad magazine. The first one was in 1995, and the second was in 2008. That's 13 years apart.
I've seen and dealt with a couple of hundred of their guns in the meantime. I've never seen any issues.
That they may not like steel-cased ammunition is not a significant concern for me. Other than that, I have owned three of their pistols, none of which was picky about ammunition in the least.
In the depth of winter I finally learned that there was in me an invincible summer.