I had mine done around 15 years ago, L4, and it was very successful.  Before I could not sit in a chair, had to stand
or lay down, numbness down the left leg. Don't let the numbness go on or you will lose the nerve and could be permanent.
It was not a real bad rupture.
I could feel the relief easily as soon as I got going the next day. One night in hospital, my surgeon told me I should
not ever lift more than 50 lbs. the rest of my life.  I have been careful with my back ever since.  I feel blessed and give
thanks.