Will you share your experience with the IUD or Nuvaring?

My new doctor has got me thinking about alternative forms of birth control (I’m currently taking the pill, and have been for about 15 years). She suggested either an IUD (hormonal or copper) or Nuvaring, and I’m reading up on both but I thought I’d ask here whether anyone has personal experience with either (or both).

What kind of side effects did you experience? Would you recommend this method or not, and why?