Nyx liners are inexpensive and last on lips [SEP] If you can find the color you want order many , that is my advice because these liners go quick.  I have had them ordered and not delivered from other retailers or have had to go pick them up ! I like what I like so whenever I see a nail polish a lip color or any product I am especially fond of I grab or order at least a few months worth . I am not one to change my color pallet so it is easy for me but at times difficult to find the shades or colors I need. NYX is just matte enough to stay on , the value for the size is great . A regular sharpener will work. Feels good in the hand . I think these compare to the expensive liners .