Although I'm not one to credit hair growth to one particular thing or product, I must say that I do love the GHE method; it's effective and its one of the few techniques that make sense too me, lol....I didn't keep specific track of inches, but it was a noticeable growth spurt since I was growing out of a big chop/twa. I credit the GHE method, Henna and The Pomade Shop growth grease along with no heat and low manipulation of my hair=GROWTH!