IUD?? Help a sister out!

Today I had my annual visit with my gynecologist. The topic of IUDs came up and I’m a little intrigued but I’m nervous.

If you have an IUD, how do you like it? Is it as effective as everyone says? Are there any side effects? Can it move around?

If you chose not to get an IUD, what were your reasons? Was it something about the IUD or just a personal choice?