I've been practing the ChiRunning technique for about 2 years now. It really did a lot for me, especially when I initially learned the techniques, mostly cos my form was really just terrible. As soon as I picked up on the basics, I eliminated a number of problems--sore knees, shin splints, achilles heel, etc. Most of the what he teaches is just focused on good form--not so much hocus pocus. HOWEVER, you've still gotta use common sense when you are injured, and also when you're not. . .e.g., knowing what sorts of pain you can "run through", knowing not to suddenly increase your mileage by 50%, and stuff like that.