I got mine at my 6 week checkup after my second c/s. My experience has been pretty good so far.
I bled every day from the day it was placed for about 2 months. Then my periods went back to normal and are now about 1-2 days long with a very light flow.
I like not having to remember to take a pill every day. It has been great. It definitely didn't do anything to help my pms symptoms (I eat everything in the house and want to cry over everything for 2 days before my periods start), but I have always been like that, regardless of birth control choice.
I'm good until 2016, and if we decide to have another baby before then, I can have it removed at any time.
ETA: For me, insertion wasn't any more uncomfortable than my annual exam. I didn't get crampy afterward and there was no pain accompanying my 2-month bleeding.