I was reading another thread when this came up...
Apart from the fact that they were common daily wear for Japanese men in traditional clothing, I never saw the purpose or value of training with hakama.
Now, I have to agree with many people and admit, at times, those pants can be trouble to move in. However, I DO think they help my training.
Their extra weight reminds me to keep my weight 'underside' and my centre low and stable. I find that when I am not wearing the hakama I move quickly and freely as my legs are accustomed to moving me about with heavy material attached.
What do others think?