Congrats. I sincerely mean that. Before I started this two years ago I didn't think 70s was all that hard. I was wrong. I have a tremendous amount of respect, not for long hitters or great ball strikers but people who can *Score*. Its hard.
Yeah, I really, really like the book. They have tests for balance, strength, flexibility, etc... (there are 6 I think). You do the assessment tests every 30 days or so, and based on those assessments you get 12 daily exercises to do. I got to start somewhat higher up due to being a tennis player in college and a decent athlete, but they have workouts for people who can't stand on one foot for more than 10 seconds, etc... Its really good.
Getting "longer" had a very small effect on my score. I still play from the blue tees (same tees) and going from 225 off the tee to 285 off the tee has saved me about 3 strokes a round. You'd think (and I thought) it would be longer, but it isn't all that helpful unless you can score. This whole experiment has taught me one important lesson: golf is about scoring. Period. As an example, on Monday afternoon, I hit a drive that was probably between 295 and 305. My playing partner hit one about 210. He hit a 4 iron wide right, I hit a wedge to the back. He got up and down, I two putted, and we both par'd. He ended up with an 80, I carded an 84. Length is not all that important.
Length is all about strength. As you go through the program, you don't feel different. Your swing feels exactly the same. But, slowly but surely, your ball just goes further. Its pretty interesting. You don't "feel" any different, but the ball explodes off the face. Overswinging and switching drivers doesn't really help I found. Getting stronger makes a huge difference.
Enjoy the book and thanks for posting. I really hope to be able to post up a "how I got to the 70s" post, but until I get there, I don't know what to say. :) If anyone else in the 70s cares to share what may have worked, I'd love to read it. Cracking 80 consistently is very, very hard.