I had the Mirena inserted Nov 2008. The Dr. was unable to get it inserted the first time so I had to go back and they had to stretch my uterus because it is S shaped and then use an ultrasound to get it in place. The pain was unbelievable for a couple days. After that it was ok until my menstrual cycle. I was placed on Vicodin because the pain was so bad. It is now 6 months later and I am still have some pain around my menstrual cycle every month. I have not gained any weight I have actually lost 10lbs. The thing that bothers me the most is the acne. Its very severe. I finally got it mostly under control. I think my menstrual cycle is almost completely gone. Everything seems to be getting better.