licks herbal liquidizer

Hey gang, anybody use this and have a review? Want to know how much rosin to licks? Like it says 1 to 1, but they give in ml used. Like if its 1 to 1 and I use 1ml of licks, how much rosin do I do use? Only way I know is a weight in grams for rosin. What is 1 to 1 with ml to g? Would I do 1 ml...