Sorry if I'm stepping on alot of toes, here, but it's not legit, and dangerous. Not only did a chiropracter screw up my grandfather's back -severely- I've seen way too many that are crooked in my work, and talked to too many doctors (MD's) that have absolutely no respect for chiropracty as a field. If you want to know/read more, try:
http://www.chirobase.org