I remember looking at this before my surgery, and I thought the same thing...how long until that core gives out? It looks like a great product, but with too many "moving parts", it just makes sense that over time, there would be a lot of wear and tear...
But it certainly bears watching...
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36 year old mom of 7 in SC.
MRI 4/2008 shows bulging disc with annular tear @ 4/L5 and and complete herniation at L5/S1.
9/11/08 Laminectomy , successful to a point...relieved nerve pain, but after 4 months was still having severe disc pain.
Treatments tried: epidural shots, oral pain killers, NSAID's, TENS massage, chiropractic care, deep tissue massage. Oh, and plenty of our homemade wine! 
May 26 2009, 2 level ADR, L4-S1, Dr. Bertagnoli, Straubing, Germany
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