Have you heard about e.l.f.'s new mineral eyeliners? I'm curious, I wonder if they're any good. The product page says the following: "The natural based formula provides gentle coverage for even the most sensitive eyes. The twist up applicator is easy for instant use, no sharpening required. 100% mineral based with no parabens, no preservatives and no chemical dyes." I know it's a pretty new product, but have any of you, my readers, had an opportunity to try this?