I always carry a knife also, currently buck slim 110 s30v , that steel really does hold a edge. I would only use in defense as a last resort . I did witness how quick someone that knows how to use one can deploy it, back in the early 80,s I was at a little get together at a deer camp when two brothers were arguing and consuming adult beverages when yelling at each other turned to one of them picking up a broken handled hatchet and the other pulling his old buck 110 and stabbing the other one . I was about 2' if that away . I can tell you it was nothing like a movie seen that fight was over as soon as the knife came back out of his belly . Funny thing about that story the one with the hatchet was mad at me for some reason I didn't understand, the good LORD was looking after me and saved me that night !