I have never heard of this, so I took a look at their website. I remember an infomercial Greer Childers did years ago called Body Flex. It was a bar attached to resistance tubing. You did strength training exercises with it. Did that work ? This is what the FTC had to say in their lawsuit. www.ftc.gov/opa/2003/11/bodyflex.shtm
Greer Childress is now hawking a new product that makes the same claims as the Body Flex. I would steer clear of any of her products. If you're looking for good exercise DVDs, there are tons of great ones out there. You could even try Coach Nicole's online workouts posted in the fitness section.
Save your money.