The overall ideas he teaches are good, but he goes too far on a few, such as:
People who take out student loans are morons.
No dave, not everyone wants to spend their college years getting 4 hours of sleep a night because they have to work 40 hours on top of their school and homework in order to "cashflow" college. Not everyone wants to live like a homeless person for the best years of their lives.
There's a biblical answer for [insert financial question here].
No dave, there isn't. The bible will tell you "treat others the way you want to be treated" and a few other things that some basic empathy and rational thought would also tell you. But when you try to relate a car loan to a bible verse, you sound to devout christians like a great guy (which is why he does it), and to the rest of us like an idiot or a panderer. We want your financial advice. If we want to hear your preaching, we'll go to your church.
Credit scores are not important and getting credit to raise your credit score is stupid.
He actually goes so far as to say that you can lease an apartment or get a mortgage with no credit score, by showing them paystubs, employment history, and bill payment history. You know, because apartment managers and loan officers are fine with spending hours on your paperwork, and going out on a limb for you based on data they aren't used to working with.
And the whole not getting credit to raise your credit score thing he asks "why would you go into debt in order to raise your credit score so that you can go into more debt?" Well dave, if you do it right, you don't go into debt. I've got an awesome credit score that allowed me to buy a house at a very low rate because I opened a few credit card accounts year ago, and use them for everything, paying them off in full every couple of weeks.