I am also a big fan of Shawn. His youtube vids and his DVD gives a complete learning system, by which a new player can learn by analogies and sensations. His drills are helpful and his explanations make anatomical sense.
I have seen plenty of teachers around me, none of them have 10% of the teaching ability Shawn has. Most of them just give some strange description of the swing, even worse, sometimes several pros at the same place give contradictory instructions.
95% of the instructions on youtube are garbage, and similar percentage can be said for live instructions. they just keep talking about swing plane, inside out blah blah, but all ignore the elephane in the room, which is how to teach a new player make consistent contact... I am sure most new players won't care about a slice if he can hit the slice every time.... it's the fat shots and the tops etc that makes the game so frustrating to learn, yet all the instructors I have seen, they all say the golf swing is a body swing, or an arm swing, or sweeping the grass, or hitting down on the ball, you name it, they got a variation for you... but none of them can tell you how to make consistent contact.
Shawn's instructions address the most common concerns of a learning golfer, and has made the game very enjoyable for me. Kudos to him.