I bought the medium shade but probably would have been better off with dark! It rolls on and the cooling sensation if the ball on skin is soothing! Distribution if the product is a bit dodgy! Too little or too much with a hard squeeze! Had fine illuminating particles and does appear to blur lines! Sadly for me it's the wrong shade and seems to make my dark circles appear worse! I was told by the sales assistant to go lighter to conceal! A huge mistake!