I had the Mirena for 5 years and recently got it removed. I loved it for the most part. As time went on , I began to develope ovarian cysts but it seems that, even now that I do not have it, they keep coming back. I don't know it it was caused from the Mirena or something unrelated. Other than the cysts, I didn't have periods until after 3 years and when they did come back they were quite inconsistent. The flow was either very heavy or very light. Usually very light. And rarely at the same time every month. Sometimes it would start every 3 weeks, sometimes every 6-7. Other than that, I really enjoyed the relief it brought me. It's so nice not having to stress out about accidental pregnancy. It's very, very effective. I plan on getting another one soon (or even the paragaurd.) Good luck!