I liked a lot of their ideas, but for anyone used to pinching pennies a lot of it will seem quite simple. I especially liked some of their ideas for "allowance" and teaching money management to children.
One aspect I found totally lacking in their discussion of how to get clothing cheaply was actually buying new with coupons and discounts. I have frequently bought brand-new clothing for my children cheaper than consignment shops. I think it was totally overlooked on their part.