we used it as a basis but tweaked it such that we ended up at repayment (and beyond) far financially ahead vs. had we followed it to the letter. some of the steps are structured (understandably) to generate feelings of accomplishment/encouragement but aren't nesc. the best numbers wise financial principles.
He addresses that in his talks, that people criticize him saying if you do the math, it's better to choose the highest interest rate debt first. He jokes and says if we were "doing the math" all along, we wouldn't be spending more than we can afford to pay.
Also, just doing the math ignores the huge psychological/emotional aspect of overspending.
Do the math is like telling someone who is obese to simply eat fewer calories than they burn each day. If it were that easy, no one would ever be overweight or in debt, certainly not morbidly obese or drowning in debt.
When I was paying down my debt, my smallest balance was $250 and the next one was $400. The rest were significantly higher but my highest interest cc had an $8000 balance. To start with that one would have been a certain failure. I only had a tiny bit of extra money each month to pay down debt, IIRC it was around $25-50. So paying off the smaller balances, seeing small amounts of success and more importantly applying those payments to the next debt, making the snowball larger, is what kept me motivated.
I couldn't wait to get another bill paid off and see my snowball get to the next level.
It worked so well, by the time I got to the card that was $8000, I was making extra payments of $800/month in addition to the regular monthly payment and it only took a few months to pay it off. At $25-50 extra per month in my early days, it would have taken yeeeears.

By the time I was attacking the mortgage, I was paying an extra $1000/week.
I can accept other criticisms of him: he goes too far scorched earth, he says to cancel cable/tv subscriptions, he says to stop contributing to retirement, he's too religious, he quotes the Bible, he says to sell the expensive car, etc. but his recommendation for following the debt snowball is spot on. It absolutely works and I'm living proof. After years of struggling, trying to pay extra here and there, frustrated, disgusted, angry, the debt snowball is what straightened out my life. I will defend it to my death.
Anyone struggling with debt, follow it and it will work for you too.
