My experience is very similar to Dazedandconfused - I was 59, 10yrs post meno and 10mths into HRT when I had post menopausal bleeding. Vaginal scan showed slightly thickened womb lining so I was booked for a hysteroscopy and biopsy.
The gynae-cancer nurse who spoke to me a week or two before my appt suggested the coil to me, listened to my concerns - which were related to having a coil in the 1980s and not getting on with it but she reassured me that they are different to years ago. She explained that they could fit a coil during the procedure and told me I could make my mind up on the day.
The gynae consultant who did the biopsy also talked to me immediately before the procedure and took me through the steps and, again, reassured me so I decided to go for it. Procedure was easy, a bit uncomfortable every now and then but bearable. I didn't suffer from any cramps but did spot on and off for three months or so.
Twelve months on I really have no idea that it's there, silently doing its job! If I had to make the decision again I'd definitely go for the Mirena. And don't forget, it can be taken out again if you don't get on with it!
Suzie