Mechanical things fail. Period. Every moving part doubles the chances of failure. For the life of me I cannot understand why companies continue to pour huge money into designing the next mechanical broadhead. Or maybe all that money is going to focus groups coming up with the next name...like "Rage". Ooh, scarey.
And speaking of Rage broadheads, Dr. Ashby's research on broadhead penetration and lethality lists 100% failure rate of the Rage broadhead. Never saw a better recommendation for a simple two blade that is sharpened and honed properly.
Sorry if I come off a little harsh. If you want to puch holes in targets, use anything your heart desires. But in a hunting scenario when an animal's life is at stake, use only what is proven to humanely kill with the lowest rate of failure. Just like the old adage that "most fishing lures are designed to catch fishermen", these new mechanicals seem to be marketed to the guy that wants the equipment to make up for his lack of confidence.