I absolutely love this product! Before using this product I always used pencils to do my eyeliner, however this tool was easy to use. I also noticed that my eyelashes did begin to grow longer after about 2 weeks of using the eyeliner. I was shocked that it actually worked. I will absolutely be buying this again.

as previous poster stated, there is a trick to applying this, mostly because it is runny

Physicians Formula Eye Booster 2-in-1 Lash Boosting Eyeliner + Serum Review First off I have to be perfectly honest. I have never in my life used liquid eyeliner. That being said. This was a ?fun? product to review. The first few times I attempted to apply. Well just say I had to remove or touch up more than once the first week. Which is not hard to do with a slightly damp q-tip. The other new factor for me was allowing this to dry. But really was only a moment. The fine tip applicator is great, once I had gotten the application down to a 'sort of? perfect art. I really do like the color as well Deep Brown. The liner also comes in Ultra Black and Black. I do prefer my makeup to have a soft look around my eyes (hey I'm not 16 any more). So after the liner had dried I then applied my eyeshadow. This worked great! I could still see the liner but not as harsh. Another plus to this one is, it did not smug or run all day! Now let's get to the ?2-in-1 Lash Boosting Eyeliner + Serum? part of the Review. I really had my doubt about the ability to grow or even thicken my lashes. As we all know the older you get the thinner our lashes appear. However I was actually quite impressed with the results. My lashes do appear to be coming in a bit thicker. This is without daily wear. I have many days I go without makeup in the heat of summer. So I will continue to use Physicians Formula Eye Booster 2-in-1 Lash Boosting Eyeliner + Serum. Physicians Formula Eye Booster 2-in-1 Lash Boosting Eyeliner + Serum can be purchased at your local market for around $10. A bit from the manufacturer: High-tech formula enhances the appearance of lashes while providing the instant definition of a liquid eyeliner, in one easy step! Lash Boosting complex targets the base of lashes where it is most effective. Innovative and easy to use eye-lining tool delivers effortless definition. High-tech Japanese formula is long-wearing, water-resistant and smudge-resistant. Directions: Apply eyeliner at the base of lashes in a fine or bold line. Never apply eyeliner inside the lash line. Keep cap tightly closed to prevent formula from drying out. **Disclosure I received a full sized product for review. Review is my honest opinion after product trial.