I got this complimentary to test. I used this underneath many of my most loved mascaras and I do notice that there is a difference in the length that it provides my lashes. It adds good length but it weighs down my lashes and the curl falls as if I never curled my lashes. I\’ve tried this one with my waterproof mascaras that will always hold a curl but my lashes still fall. This might be good for a person with naturally curly lashes but not for me.