Mirena
"I've had Mirena for three years.  It's convenient to not have to remember or worry about taking a pill regularly (and NuvaRing didn't work for me).  In the last few months I've had cramping, spotting, relentless acne and worsening depression that I can't contribute to anything else.  So ready to be done with this - I'm calling my doctor tomorrow to make an appointment to get it removed. "