I've had the Mirena IUD for about 6 years (had to get it replaced a few times cause it fell out) and I have no complaints. It hurt like hell to get it put in but now that I've had it for a while, I'm not interested in going back on any of the pills.
On a side not, the pull out method is not effective at all. You'll end up pregnant, guaranteed, if that's all you do. Condoms are a much better option if you don't want to use any of the hormonal methods of birth control available.