TGM is one of the sponsors here at Disboards. There are many, opposing opinions on his touring plans. Overall, I found his best days and the boards with other members who will critique your plan to be worth the money. I find his plans to be "drop dead trying to do everything" so we did not use his touring plans, just the best days plan. His boards are more focused than here; although, you could easily find much of the same information here and it is free. I've been to WDW well over twenty times, but had never been for Thanksgiving until 2008. He has lots of limits on the information provided and cuts you off of the boards shortly after your trip. I decided to pay the fee and I think it was worth it. There are others who do not agree, and that is fine.
Doug
PS I also used the unofficial guide, but I found TGM's best days to be more accurate, in my opinion, than the unofficial guide.