When i first joined the board i was taking them (because of another member, Macherieamour, who has gorgeous hair).
I finished the entire bottle, which lasted me maybe a few months or so....? They were cool. I didnt have any complaints, and my actually hair was doing well.
I ended up switching to another brand only because i was reading the backs of all the bottles at GNC, and another type of hair vitamin (i forgot which) had higher levels of Biotin, Silica, MSM, etc. So i figured i should switch to the brand with higher amounts of the "good stuff."
HTH