I had a partner with an IUD, so this is all the things I remember when we talked (extensively) about it. Things she loved about it: It’s the most effective birth control, she never had to remember pills, and she wasn’t chock full of hormones that made her gain weight or change her sexual behavior. She did get pretty bad period cramps, but I can’t remember if she had those when she removed the IUD. She would occasionally spot during her cycle as well. I know the insertion and removal is not totally pleasant, and, according to her, certain types of uteral shapes aren’t compatible with an IUD. They also increase the risk factors of some STDs, so it’s really important to be careful about that. Ultimately, she started getting some risk factors with it (she was 35 and hadn’t been pregnant—I can’t remember if that was the issue or if her body started to reject it), so she had to have it removed, and switched to the NuvaRing. I never felt it during intercourse. Ever.