IUD help

Have an appointment tomorrow morning with my doctor to discus BC options. I was prescribed the pill but I am terrible at taking it on time everyday. Currently have a 5 month old so don't want any more littles for a while. But if you could give me your feed back on regular IUD versus copper IUD I would love to hear it, along with questions I should ask tomorrow! Please don't recommend the shot or the one that goes in the arm I know I want an IUD just want to learn more and hear good and bad about it.