I have a Mirena. It's fantastic. I don't have to worry about it for 5yrs. I don't get AF and no side effects like PMT when I am suppsoed to be due. It's also economical as the Mirena itself only costs around $30, the OB around $150 to insert it and then that is that.

Here is a thread started a while ago on them. I would search BB for other threads on the Mirena, quite a few differing opinions.

https://www.bellybelly.com.au/forums...s-cons-123700/