"i was on yaz for 4 years for acne and pretty much had no problems. i did not experience any weight gain at all.  it may have made me moody on the angry side at times but i didn&#039;t find myself crying over nothing (i might have a short temper anyway). my acne did clear up but never completely, i have always still had a few pimples whilst on yaz but i was happy with the level it was so i am not sure if it was yaz or whether i only broke out due to stress in my final year of high school. other than that it lightened my period and eliminated any cramps that sometimes were so bad i would vomit. i only stopped taking it because i was sick of taking it everyday and it may have decreased my libido. but everyone&#039;s different."