Used this for 3 years straight. I don't know why. I liked it for the most part. But I always felt there was something better for me out there. I have thin and fine hair. When I stopped using it, I noticed a lot of hair breakage and fall out.
I love this product. I'm a makeup free kind of gal, and I wanted my lashes a wee bit longer so I could quit mascara all together. This serum truly tripled my lash length within a month. However, when I stopped using it, I noticed a bit of thinning. and they do return to length when you stop as well.