I didn't mention the 0850 earlier because of the price, but if one can be found cheaply enough, I rather like it. Actually one of my recent favorites in my current random rotation. Like any other knife, it has its cons. But I don't find some of the things most mentioned as cons. Like the thumb stud. It get beat up pretty badly, but I find it both useful and appealing. Less harsh on my thumbs than the traditional "Devo hat" studs, but gets the job done. I do wish the blade rode on bearings though. I know the point was to back away from the flipper/bearing craze. But I really like the feel of a nice, smooth, manual ball bearing action. Mine does not have any blade shake when closed. But could use a bit more detent strength. I've never had an accidental opening with this one fortunately, and hope I never do. I have had accidental pocket openings with my first and second ever ZT's, the 350 and 561. I'm actually lucky to not have any serious injuries from them. But I have a few pants pockets that were not so lucky.