Birth Control: Copper IUD - Good or Bad?

I'm looking to go on some form of birth control but I want to avoid any type of hormonal birth control so I was looking into the copper IUD and was wondering what others had experienced when using this. 
If you are using this or have in the past, how did you feel about the copper IUD?
If you have any other suggestions for the best form of birth control to use please let me know! I'm looking for something with little to no side effects. 

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