After debating for a few weeks, I decided to treat myself to the eye kohl. After thoroughly researching the application method on youtube (just search "guerlain eye kohl application" and you should find a video) and applying in the "eastern" way.. I have to say.. I am totally addicted. I've always wanted to try kohl as black eyeliner is my signature makeup... AMAZING. All I can say is that, for the price, I hope this lasts for a while. It, apparently, only has a six month shelf life (undoubtedly so that you do not get some kind of eye infection) and, while I have my doubts as to how sanitary it is, I figure that as long as you properly remove it before bed (which is the hardest part of this whole thing... getting it off is IMPOSSIBLE) and dont share it, you should be fine. I AM IN LOVE!!!