I had a Gerber assisted opening knife come open on me several times when I carried them. They were basically throwaway knives anyway IMO so I threw it away and bought my Kershaw Blur. I carried it for years and it never once came open on me. But the Spyderco is an even safer design. No spring to push the blade open means it is very unlikely to ever come open in my pocket. Good thing too because it's way sharper than I could ever get the Gerber. I thought the Gerber would be a good knife when I bought it. They make some good products. Assisted opening knives aren't among those IMO. Maybe the one I had was a cheap model. The Kershaw can be bought for not much more though and mine is a far better knife than the Gerber.