I used it when I was 22 and scared of losing my hair. The stuff works, it's just really expensive. And if you stop using it, all the hair you would have lost in that time falls out in about 2 weeks. But if you can afford it, and it doesn;t drive you crazy, give it a try.
I finally shaved my head and it was the best thing I ever did. The universe is trying to tell you that you'll look better without it. 😉 I started getting way more dates, and these days I can't keep the guys away. I'm sure the same thing will work with girls. Actually, I know it does, they hit on me too. 😉
My real advice? Shave it off when the time comes.