I've had bad luck with Harbor Freight, and I think it has to do with the Chinese model for selling stuff to the US.
Chinese factories can turn out stuff that is as good as anything made anywhere, but if the middleman thinks he can get away with selling Americans junk they'll gladly supply him -- because he's their customer, not you. It'd be different if the manufacturers owned the brands under which they sell. Then their reputation would be on the line with every tool you bought. But it's not; they stamp whatever name the middleman is selling under.