Well if he's like me, having it break the first time made me loose faith in it, and that kind of ruins liking it for any reason. The Leek was my first knife with AO. It broke right away (first day IIRC). I got ahold of Kershaw's CS but still had to spend about a week not using my brand new knife while waiting for the replacement bar (they sent it out right away, but Oregon to Tennessee takes mail awhile). It came on a Friday, and that second one broke just a few days later on Sunday, so it was down another week while I waited for a replacement torsion bar. Of course Kershaw's CS is awesome and sent me three replacements the next time, but by then I had no interest in carrying a knife that seemed IMO to too often have a part break in it.
OT from his post, I also think with the 30x's, the AO bar kind of ruins one of it's advertised features: "A 3/8-inch hex head pivot shaft nut makes field adjustments possible with minimal tools". A nut is definitely more serviceable than torx since you can use just about any adjustable wrench on it. However, because of the torsion bar, you can't take out the blade to clean it without taking the whole handle apart, and then you need a torx screwdriver anyway.