Hi, I had a coppper one fitted a few years ago, I did find it very painful during the procedure and for a couple of hours afterwards. I was told that I had a tilted uterus which may have contributed to this. But the worse thing was that I was then sent off on my way from the GP straight afterwards and fainted whilst walking home in the park! it was very scary. My advice would be after having it done ask to remain lying down for 10 minutes. I would still say that the pain and discomfort was worth it as I really didnt have to worry about contraception for the duration. It is very important to keep a close eye on it though, i do know someone that had a very nasty infection from hers.