Mirena
I got mine almost 2 years ago. I agree with the other posters that the insertion was the worst part - basically you have labor pains. I remember taking Tylenol or something before the doctor's visit but it didn't come close to taking care of the pain.
Another problem I had was with the little plastic string. My female OB left it long because they tend to either be expelled or creep back up into the uterus. I had a follow up visit and the male OB trimmed it. The female OB complained that he cut it too short but I haven't had any problems with it "disappearing". I'm actually glad he trimmed it because I could practically feel the string hanging out of me - ewww. Not to mention the sex - yes it does poke occasionally at first

. If the string is shorter it is less likely to poke your partner. (Hope I not grossing you out!)
Anyway, I love it! Other than the first initial problems, it's been great. I almost forgot to mention - because of the Mirena I don't get my period anymore
