I've been using it for 6 months. It's made no difference to my hair at all, just very low sex drive (in fact - zero sex drive).
I am not going to take it any more, these companies make billions from people like me trying it for 6 months then giving it up (I spent around $300 on these pills).
There's no way I'm going to carry on taking it for the rest of my life, so I'm going to give it up now.
It may stop your hair receding at the back, but my hair has only an inch at most to go anyway. It's not worth taking a pill for the rest of my life just to save one inch of hair.
Hair transplant doctors always recommend it, not because it's good for their patients, but because the more hair the patient keeps in the donor area the more transplants they can do on them - so the more money they make.