I've had three Mirenas since 2002, one before my pregnancy with DS, one between the kids, and now one after DD.

I think its a great form of BC. I haven't had regular periods since 2002, and I don't miss them. I had exactly ONE normal period, and got pregnant with my DD that cycle, lol.

I nursed my son for 20 months and my daughter for 13, and had no problems with supply. I got the Mirenas about 6-8 weeks pp both times.

My sex drive sucked while nursing, but has been fine since weaning. I did notice that it was better with Mirena than it was when I was on the pill.