Nowhere near as good as they believe they are. That's the old, original ANA pilots, now mostly retired, and the strike-breaking "golden scabs", still around in abundance.
The majority are/were safety hazards, simply because of the antipathy they generated on the flight deck with non-Oz colleagues.
Obviously a few exceptions are around, but they are in a minority.
I found them a sad bunch of characters to work with, and no better aviators than the rest of us, but with bad attitudes.