There are many on the budget board who swear by him.
I have heard a few things about him and he has some good suggestions but just like anything else, you need to do what works for you and not just because someone on a squack box is saying to do this or that.
And let me say for the record, I really don't know if I believe
DVC is a money saver. (I am a DVC Member). I am spending more now that I am going more, and I have become a DVC Room snob as I could not picture anything less then a one bedroom while vacationing. I am now spoiled even when I have to stay somewhere overnight on business I keep thinking how nice the DVC rooms are compared to a hotel.
The money I spent for DVC was not an investment. It was a partial prepayment for future vacations. I don't regret it for one second and would do it again.