Imho I would tend to agree with Ignacio, hakamas show our deficiencies during movement. Personally I feel that I have improved my stances and movement because of the hakama. I believe that it also carries over to street situations as well. What if someone were to attack you in knee high grass, a garbage strewn alley, or 6 inches of snow. Even a long coat has a similar feel as a hakama in my opinion. I don't know if hakamas are for everyone but I wouldn't want to train a lot without mine. Btw, I do where mine in karate as well.