I have been using pine nut oil for a month and a half, and over that time have personally experienced all its delights! For a hair mask, I used five drops, and to massage it into the scalp, I used about 15 drops. I apply the mask to my hair when it is still wet after washing, and its smoothing effect lasts until the next wash! The aroma of the mask is great — the aroma of a fresh pine tree and fresh pine nuts. I am simply delighted!