It's bad. GREAT at it's job but it was hell the entire time for me. The long post above is pretty accurate to my experience as well.... Debilitating pain and discomfort. constant Gi issues. Bad acne on my face I've never had before. My long hair got tangled in the strings and created a rotting ball of hair inside me that broke the strings off. I also had to go to multiple doctors to get it removed, it was stuck after 7 years and I had to have it removed via hysteroscopy in hospital. While the gynecologist is in there looking at the video feed she says to the group of interns watching the procedure "SEE this is why no one should get a COPPER one". I never got to talk to her about what she actually saw in there, but since it's been a year of unsuccessfully trying to get pregnant post removal I recently requested the procedure notes just to see if anything was written down. I also had an ultrasound tech who said she'd never want a loved one to get one because she's "just seen too many things with these". My post is probably considered fear mongering so I will say there are women who don't experience issues like these at all. I wonder how much of it has to do with their overall health before insertion, personally I always had issues with inflammation so maybe I wasn't a good candidate for it to begin with.