I got the Mirena IUD out a couple of days ago...
When I got it in, it hurt like a health forum. I have never had kids, so maybe that's why. It was nothing I couldn't handle, but it did hurt, and I took 3 Ibuprofen about an hour before the procedure. I would recommend this. And bring someone else to drive you home. I don't think I would've been able to.
Everybody experiences the symptoms from the progestin that it releases differently. I gained weight (although my doctor currently is checking my thyroid because of it) and was very moody, and had cramps for the whole 9 months I had it in. However, my doctor who took it out on wednesday thinks that maybe it wasn't in all the way and that's why I had all the cramping. You are expected to have cramping for a little while but not for as long as I did. My advice is to go to someone experienced because the health risks go down the more experienced the doctor is. Also, if you haven't had kids, you can get it put in, but I think there is just a greater risk of expulsion (the thing coming out) so check it often right away.
When I got it out, I barely felt it. It was really easy. I did like it because I never had to worry about getting pregnant at all, but the cramping was just too much to handle.
I hope this helps!! Good luck.