Which IUD is best?

I would love to know some real life stories about IUDs !     I want to know how the insertion process went for you, how the removal went also. Side effects after? Words of wisdom ?
Has anyone used Skyla ? 
I really want a more steady form of birth control, but I am very sensitive to common side effects. And can't do any estrogen. Please give me info about your experiences! 
If you have had some issues with IUDs, what have you changed to that works now for you? (Estrogen free)
Thanks for your info!  

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