Krav Maga and similar styles are good because they are based on real world situations and not Bruce Lee movies. However, self defense isn’t really about technique, it’s about attitude and mind-set. Almost any technique or not technique at all is effective if the fighter acts quickly and violently. You’ve got to want to defeat your attacker and to do so by any means and at any cost. In the movie “The Shootist”, John Wayne’s character describes the fighting mind-set. Speaking of gunfighting he says,”it’s not being fast, or even accurate. I’t being willing.”
Marial Arts training is good exercise and fun. But real self-defense isn’t about executing a perfect Osoto Gari, It’s about attacking your attacker and keeping attacking until he either runs away or stops moving.