I only know what works for me. The very first session (earlier this year before the insurance co pulled the plug) I thought I was going to die. I had the worst headache I had had in a while. But with subsequent weekly visits and exercises that he had me do at home in between, I actually started to improve.
When I walked out after the 3rd visit I actually had tears in my eyes. Tears of joy. It was the first time in years that I could (1) walk straight and (2) walk pain-free.
As soon as I am financially able, screw the insurance company. I'm going back and I'll pay out-of-pocket.