3-month Shot or IUD or BCP: Women, what are you using ?

I'd like to hear what you say

 

From what I've read about the two it seems the shot comes with a lot less risk of complications. I know my spouse rejected the IUD within a few weeks of insertion. She was also on the pill back then and after ten years she began to have menstrual issues. For BC I went the vasectomy route which allowed us to be sexually active without concern for many years.