thanks for valuable input."Longevity"? The jury is still out on that one. These bars haven't been out that long. We've been running them since World Finals of last year.
There have been reports of a few failures, however. I suspect that operator error may have been a factor. Whether it's on a bicycle or a ski...extra care must be taken when you tighten any bolts, on any contact points.
Carbon fiber gives no warning when it fails...it lets go catastrophically. If you value your face and teeth, ALWAYS use a torque wrench when affixing bar clamps and lever perches. We run ODI style grips... same thing applies here.
If your riding in the surf...stay with an alloy bar.
Lastly, if you are north of 200 pounds and you ride "heavy"...consider replacing it after each season.
YMMV.