C.M.
I used it bet ween pregnancies and loved it. My mom used it until she went through The Change and loved it (she used the 10 yr one, I used the 5 yr).
I see a post about Mirena about once a week, so you might take a look at past inquiries too. I've read that people either love it or hate it.
I'd use it again, but for me, now... Hubby had a vasectomy. =)