I loved assisted openers when I first got into knives, but have since went the other way and generally avoid them like the plague. I find that a properly designed manual action folder can often be opened just as fast as well as (and here's the kicker) closed faster than any AO knife. For me, the spring tension that must be overcome when closing an AO knife makes it far more cumbersome (and dangerous if your hands are slippery) to close with one hand. To me, the speed factor of a folder is measured by how quickly and easily I can draw the knife from my pocket, open it, use it, and put it back in my pocket, not how fast the blade flies open. Sure, I get it, they're sometimes fun to play with, and for many folks they're as close to an auto as they can legally carry, but from a practical stand point, a good manual folder is usually better. At this point, I feel like AO is a bit of a gimmick.