so far so good [SEP] i cannot speak to effectiveness as that will take longer than i have been using it will update review but so far so good if you have a steady hand this is simple to apply i only used it once on eyelash area as i am waiting to hear beck if this formula can have a side effect of turning the iris brown not a concern if your eyes are already brown as some formulas have that potential for the moment i am focusing on the eyebrows color consistency and ease of application are all good just use care when using eyelash application as this can smart and nobody likes getting poked in the eyeball no problem it you are good with liquid eyeliner