You can try the 35-day scientific improvement plan. The tutorial in that is more scientific. I joined, and it feels good. The video tutorial inside is more professional than before, and recipes are provided every day to be used together with other tools. The overall feeling is more scientific.

I think a friend of mine said that he gained 3 cents a month. After practicing for a week, I feel a little swollen in my joints. I wish I could grow 3 centimeters a month. Come on!