I am a graphic / web designer but I've always enjoyed drawing and studying anatomy. I had purchased a bunch of books on the topic, by authors such as Burne Hogarth, Joseph Sheppard, Chris Hart etc.. I also have the instructional videos by Glenn Vilppu but I have to say your stuff replaces everything that I own, honestly! And I'm not exagerating. Initially I've purchased 4 of your DVDs. But then the other 2 came out, Advanced Head Study and Advanced Concepts, so I had to get them as well. You had taken on a big project, but with your patience and perseverance you had completed a great instructional series. I'm in a process of going through the first 4 DVDs, and man do I have a great time watching and learning. Your methods of visualizing and explaining the concepts are so easy to follow and comprehend, absolutely brilliant. I am already looking forward to the next DVDs. I would like to thank you again and I highly recommend your product to everyone who is interested in studying the human figure and art in general.