"i have had mirena for 2 years now, and i can say that its the best birth control. i had minor cramping and bleeding when it was implanted. nothing major. i love knowing its in there and i don&#039;t have to remember to take anything. i have no periods, maybe one really light one every 8 months, i do have breast tenderness and sometimes minor cramps. i plan on having one more child within two years which i will get it taken out. it was a one time cost and nothing monthly. my insurance did cover it so i only paid 35$ co-pay. but i would have paid the full price for sure. hope this helps!!"