It works as far as inch loss. I did it for 2 years almost exclusively, but I was never so bored in my life. I also got tired of the constant upselling on her forum, but most people should be able to ignore that. I'd "try before you buy" as they are $$$. I never read the book because I had every VHS she made up until that point (like hundreds of dollars which I made back on Ebay--when I say I was bored, I mean I'd rather watch paint dry on one leg).