A bunch of threads in various places about this, but I guess I'll reply to this one.... I'm with Reach here.
As far as my personal experience, I've somehow managed to collect.... four of them (plus a Zillion).... and never had a single problem. Obviously errors happen, or things wear out, etc. I know it's cool to hate on Petzl, but they seem to be proactive on this issue and I have no loss of confidence on the gear I climb on regularly.
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An interesting note, August recently did a video on break-testing his very well used ZZ which is pretty confidence building in my opinion: