I had my first Mirena inserted 17 days ago. I was 56. Mine was recommended to try and control my endometrial lining, which never seemed to respond well to utrogestan.
I've had some discharge and light bleeding since then, not every day, though. No heavy blood loss at all and I seem to have dodged the bleed I was expecting (continuous utrogestan never stopped them restarting when I went on to HRT). I can feel my iron levels starting to improve at last.
I have put on two pounds but that's probably the after-effects of Christmas cheese, chocolate and cake, to be honest, and I have already got one pound off and the other one will probably go after a few more days of careful eating.
No emotional hiccups. No depression. No pain, after the initial day and day after: and that wasn't as much pain as discomfort caused by the nurse not being able to insert the Mirena until the third attempt (I think she had dodgy instruments: a speculum broke).
I really wouldn't know that I had the Mirena in me, to be honest. I wish I'd had one ten years ago but I paid too much heed to the negative stories online (not to downplay anyone's bad experiences: we are all different in the way we respond to hormones, but probably people who have no problems don't post as much).