I've been using Guerlain eyeliner for a long time, but when it was time to replace it, I couldn't forget the pencil-type eyeliner I'd tried before at Bobbi Brown, so I went to the counter. They told me it was waterproof and difficult to remove, and that it wasn't recommended for me, since I use milk cleanser. They asked me to try this brush-type instead. Since I've always used a brush, I'm used to writing in a thin line, so I thought this would be fine, and I bought it. This ink liner doesn't smudge, either. And the best part is how small it is. It's amazing. I've tried other makeup brands, but I've never found one this small.