OMG this product is amazing!! I had heard about this product but never tried it until I visited the P Louise Make up academy in Manchester and its seriously the best eyeliner I’ve ever used! I apply it with my Mac 263 small angled eyeliner brush and it glides on so smoothly with no cracking throughout the day. Its waterproof and smudge proof which is so true as it really doesn’t budge at all! You do have to make sure you clean your brush straight away after using it though as the bristles will dry hard! This is a must have in your make up kit so BUY BUY BUY!!