IUD opinions?

I am going on for a physical on Monday and a big topic I want to discuss with my doctor is birth control. I don't trust myself to have to take a pill everyday and my mom is anti me being on birth control (she's Mormon and doesn't want me to be sexually acive and believe birth control just encourages sex) so I don't want her to be able to find pills around as I go and stay with my parents a few times a month. I am curious on people's idea of IUDs? Pros? Cons? Symptoms, good and bad? Thanks!!!