Well, I haven't had a follow-up xray, but I can tell you how good this thing feels. I had an xray prior to getting this product revealing my spine (near the base of my neck) is straight, and not curved as it used to be. I had an injury about 10 years ago that has forced me to have headaches...neck cracking, etc. I tried a chiro ONE time, and never again. I know why people like them, and it's because they crack you and it feels good. But the problem is, you have to keep going to them, and cracking and "Manipulating" doesn't address what the real problem is. This thing does. I already noticed after 3 weeks of usage that I don't have the headaches I used to have, nor have I needed to crack my neck as often. I highly reccomend this product for people with neck injuries as it seems to "retrain" your neck and neck muscles to allow the curve to be put back. I also noticed my posture is better. Good luck!