I did have fairly good results to the only Vertiflex I have done so far and it has been about a year. Having said that tho.... I was ready to have a couple more inserted and when I tried to make an appt. with my pain doctor I was informed that he no longer was with the pain doctors I was seeing and he was establishing a new practice in an area 4 hours away. In my state (New Mexico) I could not find any other doctors doing the Vertiflex procedures. I now will be seeing my original surgeon on the 31 of March. I will report to you after that visit and tell you what my surgeon says about my condition. I am in a lot of pain but I think it is due to the other areas in my lower back that needed two more Vertiflexs. BTW I had the Vertiflex procedure done because my surgeon did not want to do any more surgeries and referred me to the pain doctor.