I think these serums (hair/lashes) work to a certain extent. I haven't seen amazing results, but there are results. My bald patch seems to have more hair and my lower lashes seems to be growing. It isn't amazing but there is something.
I would also like to add that I haven't been using these serums for very long. According to the overviews from the website, the products will take up to 3-6 weeks for me to fully see the effects. It has only been 14 days.