First day in I had cramps and upset stomach. Second day in I had cramps, upset stomach, and acid reflux. I never have acid reflux. The cramps got so bad and the pressure from the ring inside that I took it out.
Why can't it be a little more bendy and less springy? That picture is a side view of it flattened, on the directions. It was almost all the way extended inside and boy did it hurt.