I've been using eye liners for years now, & this is hands down the best I've ever used & I swear by this product! This gel liner comes in a little glass pod and a brush, which makes the application so easy, and no mess or fuss in making the line as thick or thin as you want it.. The thing I love most is that it doesn't smudge and stays put all day long! This product is definetely a MAC dupe, as it is a third of the price and does a way better job.. After using this liner, you will never try another liner again ;)