J.H.
I have a Mirena IUD, and I like it well enough. I like not having to think about birth control on a daily basis. I also get very short, very light periods. (like 1-2 days, panty-liner flow).
I do find that I have noticeable PMS symptoms, though, like cravings, bloating, and fatigue. And...though I have mostly blocked it out, I had pretty severe cramping, and very heavy almost-constant bleeding for the first few months. I remember my doctor saying "you'll love this in 6 months", which I do, but it was kind of a long road to "love" if you know what I mean.