I had C5-C6 single level ACDF 5 months ago in Dec. 2014 using ROI-C. I only had right arm pain before surgery. I was fine for about a month then I started having right arm/ neck pain and it has only gotten worse. Wondering if it is the ROI-C device as I know many people who had this surgery and were fine 6 months later. None of them used ROI-C though. Anyone use ROI-C. Feedback would be nice.