These people are dangerous. Stay away from them.
I paid for a year plan because I was desperate, had no health coverage, and for my financial situation at the time it was cost effective... but it turned out to be the worst chiropractic experience I've ever had. It was like an assembly line, no privacy at all, not a relaxing or healing environment, the doctors weren't concerned about how you were feeling and were too busy talking to other people to listen to anything you had to say, and by the end of the year I was in more pain than when I first started coming here. What they continually told me was very depressing, indicated that I would never feel better and in fact might die an early death if I didn't follow their plan. In the end, I felt like they had done more damage to me physically and psychologically than anything else.
I finally found a new chiropractor (who I still see) who gave me a lot of hope, personal attention, and in fact after a couple months with my new chiro I had a lot less pain and was feeling better than I had in years.