Eich - definately wasnt being anything less than civil, discussion/debate is good, and I do agree that in many cases it may not be the best option, but they definately have their success and uses.
Cant remember exact details on surgery, but he was at the stage where he couldnt walk, had to crawl to the toilet, excrutiating pain even doing that etc. Was in his early 40's at the time. Discs had something to do with it. I don't think the other chiros ive used could have achieved this result, our original guy who practiced at the Olympics was miles ahead.
Headaches - I don't use chiropractors anymore, and haven't for a very very long time. There was a distinct correlation between treatment and cessation of headaches.
The only thing that has ever improved my back has been weight training, and stress reduction. Huge changes that a chiro never went close to, because they could never fix my posture and increase muscle mass.
I see them as a "why not" if you have a problem that seems suitable. Sent one of my clients to a chiro recently, great results so far, she has a very messed up cervical section, but she is the only one I've sent. Everyone else is just posture/stretching/weights/physio.