I have been looking for years for a qigong to give me the workout that this one does. Aside from the excellent exercises themselves, this DVD also features the following:1. Excellent instructional design -a. History of the five animal sports.b. Five element theory with Kathy Yang.c. Each piece has a detailed introduction by Dr. Yang stating why the piece is done the way it is and what it works on.d. Each piece is then practiced by Dr. Yang's class of 5 students.2. Easy to follow along at your own pace -Because this is a DVD, you can skip over the chapters you are not currently interested in. I have been following along every day. On the weekends, when I have more time, I review the detailed instruction. On the weekdays when I do not have as much time I just follow along with the class. Following the students from beginning to end (including the warm-ups) it takes approximately 1:15 to complete all 25 movements.3. Excellent production. High quality video, charts and graphs included for five element theory and TCM. The background is not too busy. It is easy to see what Dr. Yang and the students are doing.4. VERY detailed information - you really learn WHY you are doing the exercises. Dr. Yang invites you to modify them to suit your needs after you understand them fully. This is definitely NOT a DVD you should follow blindly. It teaches you and encourages you to think for yourself.I agree with other reviewers. This exercise routine is quite strenuous. I would not recommend it for beginners.I have quite a few of Dr. Yang's DVDs (probably about 10) - all of which are very good. However, this is the crown jewel of my collection.I cannot recommend this DVD more highly.