"All I can say is that it works. My penis went from 5 1/2 inches (Length) X 5 inches (girth) to 7+ (Length) to 6 (girth) over approximately 1.5 years.
My wife loves the changes but doesn't want me to get much larger so I'm maintaining here. Not even sure if I could get much larger.
Early on, to get my initial growth in length I did the exercises exactly how you described them. I got to 7 inches very rapidly this way and have been maintaining since around June. I do keep working on girth to maintain thickness and do my exercises on a semi-regular basis."