Look at www.knifeforums.com
The disigner of the knife is on line there, and there was a long discussion about thr lock. The upshot was that there has never been a reported failure. I've gotten weird about knives: if I can't hold it, I don't buy it (except for customs, of course). One of our local stores just ordered some revolvers, and if it feels good, I'm going to buy one.

PS - there are two models -- a 'Hunter', an another that slips my mind.