I am about 14 years into my L4 - L5 overhaul. My outcome was as good as it gets. My therapy was to walk at least a mile a day. Wish I had it done 5 years sooner. I am now starting to have issues with the joints above L4 but I am not sure, at my current age, it would be cost effective to have more work done. Good luck and do what your Doc tells you to do!