I practice TaeKwon Do and I got this DVD as a kind of complement to the courses I take, knowing that Tai Chi is much lower impact and meditative, yet it still has elements of balance and energy that might hopefully help me improve in my practice. It's a lot like what I expected, very slow and careful movements that flow in time with your breathing, and I think it's very peaceful and yet still decent exercise.
I found this DVD to be an absolute wealth of information. The instructor sure manages to talk about absolutely everything, so you have no problems understanding where your feet are supposed to be, or where your weight is, or what each posture is supposed to be representing. It was really quite useful, and while he covers a lot of material very quickly, even in the introductory section while we're learning the postures, I managed to remember a lot of it, and it did seem natural after only a few practice sessions.
My problems with this DVD are minimal. First, I would like him to go a little slower in the Qi Gong section. While I know that everyone is different and will move at their own pace, he says to time your movements to the inhale and exhale of your breath, and to use your full lung capacity with each movement, and yet, I was halfway through one inhale/exhale combination when he was done with his second, so I was kind of left behind at a few points. Maybe I just have exceptional lung capacity, but as an ex-smoker, I kind of doubt this.
Another problem that I found was that I don't think that the flow gives equal attention to both right and left legs, as I found my right side to be harder worked than the left. A reverse flow might also have been helpful, but perhaps there is a good reason this is not included. According to instruction, each direction of movement is supposed to have specific metaphysical benefits.