i think c-clip eliminator kits are a waste of money for the most part ( in the recreational offroad world at least ). they arent intended to make it possible for you to drive home with a broken shaft.. they are intended to keep the axle from walking out when it breaks.
the Jeep that breaks a shaft on the trail can limp itself to a safe place to make the repairs, and even off the trail if you are industrious enough to come up with a way to hold the axle in place. but i would venture to say that a broken axle shaft doesnt really increase the overall danger of the immediate situation, although it does complicate things.
the guy who needs eliminators is the guy running a built V8 in a Mustang on the drag strip and breaks a shaft at the 100' mark under full throttle.
that is the guy that NEEDS his rear wheels to stay in place and not walk out of the housing..... save your money.
c-clips dont fail..... weak shafts fail. spend the $$ on quality shafts or upgrade to a better axle.