Well shot, well edited, and paced quickly enough that you don’t get bored, but slowly enough that important topics are covered in depth. Where else are you going to find an instructional documentary that takes you inside growrooms? For a younger generation, (accustomed to learning visually) this DVD is an invaluable resource. Of course, if you’re a serious student, read the book, but the DVDs are a great place for the novice to start.