I am a user of waterproof mascara on a regular basis, but my daughter was anxious to try this. We went to the lake for a weekend and through swimming all day, her mascara remained waterproof. It was good for preventing mascara from running or making shadows under her eyes after swimming. She has the time to apply and it works good over any mascara. On occasion I like to use a more glam-lash mascara, I will use this to make it waterproof, especially since I like waterproof all of the time. We will use our mermaid box tube, but I am not positive that we will purchase again because we usually use waterproof mascara.