For all those who are talking about "mixing and matching":
Some of you have gone to ESA events and/or had lessons with high level PSIA instructors. Do you tell Bob Barnes/Mike Rogan/Weems/etc afterwards-"Sorry, but I'm going to keep doing the same things I was doing before the lesson, even though you suggested to do something different, because I don't think it's holding me back. But thanks for the addition to my bag of tricks." I would suggest that if you feel that way, you probably should find an instructor that you respect more.
Many of us wouldn't do that with Harald either, even though we only paid a small fraction of that money for his books and videos. I'll say this: you CAN get some benefit from just "trying" PMTS, but the really cool things happen when you make PMTS your way of skiing.
If you just want to diddle around the hole, that's fine. But if you don't know what it's like, please don't come here to deride those who have actually "put it in". Because at some point (you may not be there now) that's what it's going to take to really understand PMTS.