I read Esther's book - got it from the Library - after seeing Dan John recommend it (or at least I think he attended her seminar or whatever).
I have back pain too. I didn't follow Esther's advice to a T. I think she has some decent suggestions, but I'm not completely convinced about her theory regarding how people should bend over which to me is basically a romanian deadlift bend.
I'm probably going to break down and go to a chiropractor, but I'm also curious what others think about these two methods.
EDIT: Sorry, never addressed the products. I did try Esther's at home traction techniques without buying anything, with little success.