I know some people that had it and it didn't work.
Also,don't agree to pay for a whole bunch of treatments up front.Tell the chiro that you want to pay each treatment.
Don't let them talk you into paying it all up front and tell you money back gaurantee,because if it doesnt work ,they will claim it did give you more range of motion etc..and not refund the money.
I went to chiro school but I am in a different profession as I was turned off by a lot of what that profession preaches and practices.