No, because I've done it just a few times but it must work because the feeling is so great, jo can feel your legs growing while you're in the meditation, it's really intense.
The most people, who gained height with this methode gained it after 6 months of daily practicing, at first they didn't gain much but then they gained like 2 cm every week.
I think this is because at first you don't really believe in this and so you can't fully open yourself / your body to grow but then, after it clicks, it works.
Good luck
best wishes
tom