This was mentioned in a very long previous thread about TGM- but I think it bears mentioning. The DIS rules, don't get me wrong, but the problem is you get so many opinions about everything. Of course that makes sense given all the people that post here. The good thing about TGM Mike is that he is an "expert" or at least you need to believe he is the expert if you are to use his service. You trust his expertise and you get one way of doing things (not a dozen different ideas of how to do things)- and that in the end can be much simpler.
I used TGM for our recent trip and found him to be correct every time. Although he provides a vast amount of information, if you like to read about Disney you can learn how to think about Disney in terms of lines, crowds etc. Think of being taught to fish instead of being given a fish. That way even if you deviate off the suggested plan, you can make good educated guesses on what will be good to see when. I would definetly recommend his site-just be aware that you need to be fond of reading!