In my opinion Zero Tolerance knives are the best knife for the money I have ever seen , to be honest I'm not big into Kershaws, but I love zt their materials are awesome, the knives are over built, warranty is great, I was gonna post a thread on why I believe Zero Tolerance Is the best production knife company right now, but I saw this thread. I've owned the zt 0350x2 a 0300, 0301, 550 551 and have a 560 on the way, I've never had a problem with any of them , no blade play no f&f issues NOTHING! I've also owned a lot of knives from a lot of companies, and on all of them at least 1 if not more of those knives has had some sort of issue, but not with ZT every knife has been perfect period.