Anybody purchase this and did it help?
If you're a high handicapper average duffer like me with poor flexibility, it's a nice simple system that helps take the back ache out of golf. ( I have plenty of other sports that are more stressful on the back, I don't need golf to be another one of them)
I am also guilty of an over aggressive golf swing, for my age (52), plenty of strength, but a dire lack of flexibility, so Goeck's methods help me keep the swing under control, simple and more systematic.
This is probably not the system for low handicappers who already have a good game ... unless they have bad back issues and are trying to find a method that allows them to play more pain free as it were.
I was reminded of the other idea behind Goecks by Dufner's coaches' comment:
The "perfect connection" supposedly coordinates the arms with the body on a fairly simple shoulder plane (although it doesn't look like he uses a shoulder plane to me).
The towel drill under each armpit, and the ball drill between the elbows — all fairly standard stuff — bring my arms closer to my body which means an adjustment in stance and distance from ball, and those are major re-adjustments right there if you are working on drilled-in muscle memory for consistency.