Hi Margaret,
Sorry I took so long to answer. I've been busy doing things I hadn't been able to do last year and haven't had much time at the computer. In answer to your question, now that I've had my Kineflex disc for almost 6 months (I see my surgeon on Friday) I have no complaints. It has worked extremely well for me, changing my life greatly. Sometimes I find it hard to believe I used to have back pain. I am going to take care of my back from now on.
Best of luck as you await your surgery.