Quoting Smartass *Preggo!*:" I had Mirena for 4 years. I loved it and Ill get it again after this baby."
I had it for two years, got pregnant in the first month of having it out, and had another put back in after my son's birth.
I don't really have periods and I've not had any of the weight gain/mood swing/lethargy issues that many women notice while on it.