After breaking a few stock chains on my Mtb's, I upgraded (?) to the gold series chains offered on Amazon. I have had such good luck with them that I decided to use them on my road bike and after 5,000 miles last year, the chain is still well within spec's.
Moral, as far as I am concerned.... the gold chains cost about double but last more than twice as long without leaving me stranded when the stockers break.