I have posted here before and wanted to post an update because after my Dr. recommended Mirena to me 1 year ago, this website and all of the complaints scared me away from it! Fortunately, I gave it a try anyway. I have never been pregnant before and the insertion was OMG painful. Fortunately I had someone to drive me home. I was out of commission for the rest of the day, and I had severe cramping for the next two days. But after that, and for the past 12 months, the only side effect I have had is irregular bleeding, which is very slight. I have not had problems with acne or weight gain or cramping. It has also been 100% effective. I recommend it to my friends.