I’ve used this product for a week now and there is a noticeable difference. I apply the product on the base of my lashes on the top and bottom. I’ve noticed my top lashes are a bit thicker and my bottom lashes are slightly longer. On my bottom lash line, there are small areas where lashes have not appeared and now lashes are growing there. I really recommend this product if you want longer and thicker lashes. Just remember it takes time to see a change from when you first start using the product.