a buddy of mine went through two sets of those bars in a very short period of time. they kept snapping right where you'd expect: at the carbon bar/metal sleeve area--from some pretty basic things: one bar failed while he was literally pumping some rollers on a blue trail. the other failed when he did a 3ft huck to flat. i remember both times distinctly because we were shuttling trails and having my buddy's bars break on the first run both times meant a quick end to our day riding after having driven 3hrs to the trailhead.
those bars are an absolutely piece of junk IMHO, especially at an insane price of $425.
renthal fat bars are far superior to these things. better yet, use the money to upgrade your suspension.