With this method, we've seen by far more progress photo documentation success that the others. Not to say it's the cure, but certainly consistently yields more visible proof than any other method.
I think it upsets a lot of people who have tried it and failed because they didn't put the time in, and were too embarrassed to give it a real shot... or just people who have an underlying problem with their body causing this. I think it's by the best bet for people who got this through a physical trauma.