I'm married to an Osteopath and I go to a chiropractor. I think what the chiropractor has done has had a positive effect. Then again, I have a very good chiropractor. He doesn't have an X-ray machine, unlike most of them. It's obvious that he can identify what is out of whack by feel.
It's interesting that there is a PT/MD approach to the same problems, but my impression is that finding a person that is willing to treat the low-level issues that chiropractic treatments address would be extremely difficult.