Yes, I do, for the following reasons:
1) Speed of depolyment of a e folder is of the essence if you are forced to defend yourself with it. A recent seminar featured drawing under simulated stress and easily flicked knives (SOG Arc-lock) or those made easy to open (EKI Commander) proved fastest. I took a Pinnacle knowing I'd have to cut targets and wanting the strongest lock I had. In terms of opening speed (it would seldom flick) I was the slowest in the class and the stud cut a furrow in my thumb; had to switch to my Delica to complete the course.
2) FWIW, the instructor recommended the Endura as the best compromise of weight, quality, and performance. He also recommended a partial thumb hole opening, followed by a partial "flick" to lock the blade in place for maximum deployment speed.
3) I now carry a CRKT KFF, which is unnaturally smooth, and the blade shape & weight distribution allow for reliable flicking. The stop pin seems strong enough to me. I worry given the softness of AUS6 about the back of the blade peening, but if it does, it was a $35 knife. I'll probably switch to an Axis AFCK when they become available, though (my KFF Pro won't flick & I hate loosening pivot screws).