Im running a huglu made Turkish o/u right now. A dehaan. Cz's are made there too.
Wife has a 20 ga. mallard. She has lots of rounds down the tubes from trap shooting, and i have a few hundred waterfowl hunting and some trap.
I have ejectors and she, extractors, no problems with either so far, other than a broken firing pin in the mallard, that cz repaired under warranty.
And if we do have any, cz will fix the problems. Maybe not under warranty, but repairs can be made to either.