This is a great product for all day, long lasting eye liner. It doesn't bother my eyes as many products do, so I'm enthusiastic about that. The Bobbi Brown brush is also great.
I got this in Espresso Ink, and the color is so simple and beautiful! It applies smoothly with an eyeliner brush. I really like how it's waterproof, especially with the hot weather right now. My only complaint is how some of it falls down to my lower lashes and ends up giving me the slightest dark residue. Other than that, well worth the money, especially since it lasts me over a year!