I'm not sure where you got ADR on L5-S1 level does not have as much of a successful history as other levels. First time i heard that.
I've seen plenty success stories. I had l5/s1 adr disc and no issues there.
I think it all comes down to the Dr you go with and the disc that is selected.
Feel free to PM me if you have questions.
Cheers,
Karger
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