But I have NEVER heard a negitive comment about CZ, not even as minor as that.
Here are a few issues I've seen w CZs:
Over the yrs some runs of guns have had weak recoil springs not to specs. Some had problems w slide stops/springs, would bounce and lock mags open w rounds still in mag. Roll pins breaking in models w firing pin block in slide when dry fired. Out of spec frame rails (first 20K of 40K ordered by PCR rejected for that reason, among others). Safeties too mushy or too hard... CZs were not in the running, but were evaluted by USAF and JSSAP in the late 70s, early 80s; they were good, but not great. The Tangfolio clones were considered in one of the various M10 trials (after the M9 slide fiasco) that Beretta won again.
Both have been around since 1975 w millions of each produced. Both have been copied, some runs of both have been better than others. I suspect if the CZ had not been a comm block pistol, had a decocker version sooner, etc, it would have done even better than it has in Military/LE sales.