Ken Bowden, former Golf Digest editor and Jack Nicklaus' writer for 40 years, talks about SWAIL and Barry Nolan [1:25]:

SWAIL will change forever how you look at the golf swing. And, it’ll change how you swing--for the better.
And, whether you’re a beginner or a pro, old or young, man or woman, SWAIL is for you.
SWAIL’s author is Barry Nolan (AB Princeton, MBA Columbia). Over ten years ago, he got fed up with the proportion of lousy shots he was hitting. Instruction didn’t seem to help much. So he set out to figure out how the golf swing worked, because he wasn’t sure anyone really knew.
He did his best to clear his mind of all instruction he’d ever seen or heard. He began gathering images, both still and moving, of people who had played, or are playing, the game at its highest level. With his digital videocamera, he captured the moves and positions of 198 tour pros, including all the big names, most from multiple camera angles. He also dug into anatomical texts and biomechanical research papers.
He was looking for moves and positions common to all great players, and he found them. Though all swings are uniquely recognizable, all top players share certain moves and positions in their swings.
SWAIL has designed new instruction to help you make the same moves and get into the same positions as these great players. The SWAIL dvd contains unique drills to help you get the feel of a tour-pro swing. This dvd also contains just three swing thoughts that, when taken to the practice tee, will help you achieve shotmaking that will stun you.
SWAIL works. You will both know how the golf swing really works, and you will hit the ball much better. The Swail dvd is priced fairly. It works. And, it costs less than a new putter! Why not finally get your swing right and get much more enjoyment from your golf for decades to come!