I got the "Physicians Formula Eye Booster 2 in 1 Lash Boosting Eyeliner and Serum" from the company when the company had a giveaway of them on their website. Overall this product sounds too good to be true, so I was excited to try it and see. I love Physicians Formula as a company in general, but have only tried their bronzers, so I was also excited to try some different kinds of products from them. Overall, I love this as an eyeliner. It draws a super dark black line. You can make it as thin or thick as you want, which is a great way to control your look. I love it and have been using it everyday for a while now. It has actually lasted a really long time. I would definitely recommend it as an eyeliner. While its a great eyeliner, it did not "boost" my eyelashes at all. I do not feel like they are any longer, thicker, or fuller at all. So if you are looking for an eyelash growth serum, I would recommend looking elsewhere.