Hi C.,
I had Mirena. I did not have a good experience. It started out fine. I had spotting for three months and then my period disappeared. I had read that this happens sometimes and my doctor confirmed it so I relaxed and let myself enjoy being period free.
About a year into it, I started feeling not quite myself. I was very lathargic and unmotivated. And then at other times, I felt very jittery and tingly almost like I was going to jump out of my skin. I became irritable and my family did not know what to think.
When I saw my doctor, she assurred me that the Mirena could not be to blame. She said that I must be depressed and prescribed a medication. At this time in my life everything was going great so it didn't fit to me. She said that sometimes people get depressed at "good" times in their lives. Knowing better, I started taking the anti-depressant. My symptoms intensifed almost immediately. She prescribed a second prescription which I did not fill.
About two months later I had my period. After it was finished, I was back to my old self again. It was amazing. I realized that my body must have been struggling to have a period.
However, like an idiot, since I was feeling good I did not remove the Mirena. After being regular a couple of cycles they disappeared again. I started feeling "strange" again. I made an appointment and had it removed. When I was there to have it removed, my doctor again insisted that Mirena could not be responsible for such side effects (except the missing periods of course). Since my Mirena has been removed I have not had a problem since. Maybe she was getting a kickback?
Since my experience, I have discovered many women with the similar experiences to mine. Strangely enough some of their doctors also refused to acknowledge Mirena could be the culprit, yet upon removal they too had their symptoms disappear.
I know many women love it. And, I hope if you choose it you'll love it too. But, if you start to feel tingly or like your going to jump out of your skin, remove it.
Good luck.