Most of the people that I have talked to that have had it, were not happy with it.  It is permanent, and irreversible.  My Cousin's had her back done, and is very happy with it.  I would think long and hard, about alternatives first, like the DRX9,000.  I had my lower back done with this technique, and so glad I did.  I almost had bone on bone, the disc was so flat.  I do not have the problems I had before,  I need to get my neck done next, fingers go numb now and then.  I have bone spurs, and arthritis, in my neck and back.
     The DRX9,000 is a spinal decompression machine, that is computer guided.  I fell asleep on it.  Of course, I fell asleep in the MRI machine, that sounds like you are in side of a cement truck that is having dents knocked out of it.  But it does work.  Ask your Chiropractor, if he knows any Chiropractors that have it.  I would highly recommend it, be fore going the fusion route.  And it is a lot less expensive!
                                                                        Wayne