A bunch of our friends got into chi running last year, so DH and I bought the book. I read some last fall, then after my 5k I quit running for a bit. Recently DH has picked up the technique again and bought the DVD. I would like to get back to learning it, but honestly I've been so focused on learning to swim I feel like I can't learn chi running at the same time. I do practice a few of the basics when I run, like trying to keep good posture, lean forward, and high cadence. The book did point out to me one of my biggest problems, that I'm a heel striker, and heel striking kills your knees. I had an ACL reconstruction and a scope in my right knee 8 and 7 years ago, and my other knee is problematic as well, so I try to keep in mind to land mid-foot.

So to sum up, we have the book and DVD, DH is progressing well, I will probably start from scratch learning it after my triathlon in July. FWIW, our friend who introduced us to the book last year noticed huge improvements in his running and just completed his first marathon Memorial day weekend.