Though this was my first experience in Qigong, I found the tapes clear and easy to follow. A good source of meditation material for self-help as well as for teaching others.
I had to re-wind a few sections to get down the instructions for the qigong exercises right. It may be better if there was a diagram to show what you should really be doing. Not for the audio-impaired learner or for the visual-learner, but it is quite interesting and I think I'm starting to get the hang of it! It might just be easier to practice yoga or go to the gym to energize your body, but I believe activating your qi is far more beneficial, provided that you're able to follow the instructions and don't fall asleep while listening to the tape.