Hands down the best eyeliner currently on the market. I don't leave the house without an eyeliner and have used tons of products from Urban Decay to Chanel to Lorac, etc but when I was introduced to the twist turn liner from Club Clio it was like a match made in heaven. My biggest gripe with most liners has always been smudging, transfers, short wear time but this product is everything you can hope for in a liquid eyeliner. It goes on very smooth even without a primer, it sets in seconds! I can blink, move my eyes, etc without worrying about smudges. You can make the line as fine or as thick as you want and it stays on all day and all night if need be! I only wear black shades so I use Club Black which has a little bit of metallic shimmer for a three dimensional effect as well as Urban Black which is a more traditional black shade. Korean Beauty products are becoming more mainstream and this is truly one of the best on the market. They usually sell for $18-$22 but if you have a Club Clio store near you or check eBay/Amazon you can get them for $10-$11 on sale.