"i love yaz. i suffer from adult acne and yaz always heals it within 3 months of taking it. i love that my periods come at the same day every month and only last about 4 days. the other thing i love about it is it seems to level out my moods. i&#039;m not so up and down like i would be without it. as far as its effectiveness for birth control, i have never gotten pregnant while on the pill which makes me and my husband very happy."