The Mirena IUD was (after a solid year of spotting) 5 years of no periods. I got it replaced, 6 more years no periods. That is 11 years no periods. Also the best birth control known to science right now, smaller failure rate than getting tubes tied or vasectomy. And none of the side effects I got with the pill.
Not the copper IUD, that was a nightmare. 2 weeks bleeding, heavily like Carrie, one week off, repeat. Got so anemic I couldn't go up stairs without panting. Terrible side effects with that one.