Short answer - No, not in my opinion.
It was originally founded on very shaky thinking about medicine.
They make wide ranging claims that spinal manipulation can cure all sorts of diseases, with little explanation as to how.
Spinal manipulation can be dangerous.
The British Chiropractic Association is currently suing Simon Singh, a respected scientific commentator, over his use of the word "bogus" when describing some of their claims. In their own defence, they have released details of studies which they say support their claims. Close analysis of the trials data they have submitted shows these trials are of very poor quality, with little or no control, and highly subjective interpretation of the results.Futhermore, they left out trials which were very well designed and controlled, which showed no evidence chiropractic was effective.
Anecdotally speaking, howver, you will get some people who claim it is the wonderful and effective.
Read around it, treat anecdotal evidence very sceptically, and then make your decision.
http://www.skeptics.org.uk/article.php?dir=art icles&article=chiropractic.php