Just keep in mind that after age 35-ish, being on any hormone birth control increases your risk of blood clots, therefore increases your risk of stroke and other nasties. Also, if you DO react badly to the depo in any way, you can't just take it out, you're stuck with it until it leaves your system!

I have the copper IUD, and I couldn't be happier with it. I had an abnormal amount of cramping for about six months after I got it in, but after that no problems!