"insertion had a sharp pain for only about 15 seconds - i breathed through and it was fine. cramping afterward, and from then on, my periods were a little off schedule but that was all. this has worked for me greatly. you just have to make sure its in place - my doctor cut the string long enough so i could touch it with my finger. this is a good way to keep track of it without anything going wrong, and so you can catch it if it moves. i have had worry-free sex since i got it. its a wonderful thing, just be aware of where it is!"