I do have to say they did help my lower back.  However, two fallen arches later....
they are not worth the money.  I liked the shoes, very confortable at first, but within 2 and 1/2 months the back of the heels wore down to nothing.  Now I have huge blisters on my
feet and $100 pair of shoes I can no longer use.  Very dissappoited.  Never had that problem with my Avias.