What dealsaver does is for the disciplined, educated, and financially able/willing. I'm not willing to mess with it, so I don't do it. He certainly can make money borrowing at "3%" (after the fee) and making 6% on a CD.
Dave Ramsey is more about changing behavior than giving intricate financial advice. He's an extremely good motivator.
On methods to get out of debt:
The Secret to Debt Reduction