I made the switch from Mirena to Paragard last May after the Mirena kept my uterine lining TOO thin, therefore leading to near daily spotting (I had the Mirena for about 10 months). I wish I could tell you that I love the Paragard, but I don't. The switch did immediately stop the spotting problems, but I now have inconsistent, very heavy periods. Probably TMI, but heavy in the sense that I sometimes can go through an overnight pad in 1-2 hours. Also, my periods now range anywhere from 7-13 days. And since I've had this for 10 months now, it seems like this is where my cycle has "settled" and I'm not happy with it. I'm going to have it removed soon - my husband recently had a vasectomy, but I probably would have had it removed anyway. I know a lot of people who have had positive experiences with both IUDs, so my experience is probably not the norm. Just wanted to share it with you though since I've had both. Best of luck to you!