I just bought this tonight and put it on before the fireworks in the Nordstrom dressing room (insane..lol...). My eyelashes looked so long! However, I did put it over my Chanel Inimitable Waterproof, but the curl was already starting to droop, so I curled them again, and put two coats on. My lashes were long and glossy and gorgeous. It lasted through lunch, four hours on the beach waiting for the fireworks, and then an hour for the fireworks, and the monstrous traffic-ridden drive home. I almost hated to wash it off!
EDIT: It's a good thing I didn't want to wash it off...it doesn't COME OFF. It took heavy duty YSL eye makeup remover, which DIDN'T COME OFF, I tried olive oil, which works for every other kind of normal mascara, and I tried Purity Made Simple. In the end, the only thing that worked was my using my finger nails to scrape the mascara off the individual lashes, which was a pain in the a**. My lashes fell off. The one night I didn't do it, I woke up with an eye infection, so now I can't wear ANY mascara/eyeliner/eyeshadow until that has cleared up. It went back to Sephora, needless to say.