I've had a couple of Kershaws (Blackout and Vapor) and a friend has had a few, including the Blur. I really like their designs, unfortunately, each and every one of them has "died" within just a few weeks to a month without heavy use. For example, I'd only had the Blackout for a month when the lock failed. My friend had only owned the Blur for a couple of weeks when the pivot screw (bolt?) that holds the knife together literally fell out when he opened the knife.
As I said, none of them were subjected to hard use. Since most of the people I talk to that have a kershaw love the things, I guess we just got the lemons (2 or 3 times in a row) but to be on the safe side, I won't be buying any more of their knives.