Yes I was an early ready of this system and love it. I remember reading one time that you should hear a whistle off the plane blade. Never heard that until I did the scary sharp.
This last year I did a test to see if you could sharpen particle metal and HSS as sharp as Carbon steel. I used the scary sharp method up until the final stropping. What I learned was all 3 steels sharpen the same as near as I could tell. You could drop the edge through paper and is sliced it like butter or even easier. shaving hair was no challenge at all.
Anyway I will forever be grateful to him for introducing us to that method.