One more thing guys, I am confused how some of you can't use the lock with one hand? I am a righty and all I have to do is change the grip of my index finger from the choil to the piece of metal that releases the lock and pinch. I like it better than the lockback because I have to completly change the grip of my thumb which I feel secures the knife more than the index finger. I am a clumsy guy and I have dropped a few lockbacks changing my grip this much. on a lockback you also have to place the index finger at the top of the handle to stop the blade and then close the blade. With the Compression lock, I can pinch the lock and close it shut with a little flick of my wrist instead of the steps I have to take with the backlock. my favorite lock before this was the axis lock, but now I like having the lock completly tucked away inside of the knife instead of two huge studs sticking out. It keeps the knife cleaner looking in my opinion and also keeps it from accidently dissengaging. Being the dork I am I was stabbing cardboard and I stabbed a bit too far with my griptillian and a piece of the cardboard gripped the axis lock and disengaged it. This would be an impossibility with my Para. I would like to thank Sal and Spyderco for this design. You are going to have to work twice as hard to get this out of my pocket now.