I have the aus8 version (my edc), CTS-XHP, and the S35VN versions and think the action on the aus8 is the best. The other two I have are stiff and have alot more resistance, even after an application of lubricant. They probably need to be broken in and used more. I have used the aus8 version for everything from actual self defense , unclogging a tiller, cutting fruit, opening boxes, and using it to pry things. The knife refuses to quit and is able to keep pace with me. The blade has not chipped, deformed, or rusted. I have to admit based upon my personal experience, that Cold Steel puts out a good product for an extremely reasonable price point. I do like the other knife brands also (except Mtech), but it is very hard to find another brand that can comingle high quality at an affordable price for the everyday working man.