I've always had trouble with liquid liners due to an unsteady hand and impatience-- I don't like waiting for products to dry. I was instantly in love with this one from Etude House. I have it in black and the color is so intense, and it dries to a flat matte finish. I know many people find brush applicators to be difficult to use, but I personally prefer them, as I think it's easier to make a more precise line. With this product I do a daily, delicate cat-eye that lasts all day and frequently get compliments. After awhile it does start to clump a bit in the opening of the bottle, but for the price and the effectiveness this is no issue for me. Oh M'Eye Line is a must have in my routine!
I bought this in Korea for like $3, and it worked so well. The liquid is opaque, with only one stroke, the tip applicator is a flexible plastice felt tip/thing. The formula is great, it dries to a rubbery finish, a formula I've used only in Korean brands of liquid eyeliners. No flaking, great value for the money. The reason I didn't give it 5, was because it dries out too fast. If I still wore liquid eyeliner, I would still buy this.