you said "best lock" so here i go. i don't consider a lock to be the best because it is the strongest. i am used to regular lockbacks and never had a problem with them, but i also love the axis. it is stronger and is still ambidextrous, also very smooth. i don't really like liner locks, and am waiting for a frame lock, so i can't comment there. the rolling lock is strong, but i don't really care for it. too complex in my opinion. in reality, the best lock is the one you are most comfortable with. on my person right now, i have four spyderco lockbacks. but that's me.