We've been on 3 WDW trips and for the first two, I used primarily the Disboards for my planning. For our most recent trip, this past January, I subscribed to TGM.
I have to say that I was skeptical at first, thinking that with the multitude of offerings on the Disboards, surely I was getting all the info that could be "out there". I went ahead and paid the around $20 and figured that I would regret spending that money .... I was pleasantly surprised to be wrong ..... it definitely is worth it. (I realized that even more once we were at WDW and I had all my notes).
The most helpful sections that I found are the areas where Mike helps you figure out which parks to go to on which days. His suggestions are based on historical information + crowd levels + days of the week ++++ (plus lots of other reasons, but I can't remember what they are). Suffice to say, this guy does know what he's talking about.
One thing to know is that it does require some effort on your part. You don't just plug in your information and out spits a report on all that you need to know. You do have to delve into the myriad of sections pertaining to the needs and wants of your family. It does take some time to manuever your way through the system, but once you have that figured out, it is worth it.
Think about how much $$ you are spending on your WDW vacation. When you think about that number, $20 is nothing. I probably didn't utilize everything offered through TGM, but it did really help us avoid a lot of the lines and gave us a better vacation experience.
There are also message boards on TGM and other posters are very generous in offering advice and helping newbies make touring plans. If you are like me, I like knowing what I am doing (and since you are here, I'm guessing you're the same way). My TGM notes and information made me feel more in control of what was going on and we didn't waste precious time figuring out what to do next. We had a plan and forged ahead .... and my family didn't even argue, they knew that Mom had done her research and trusted it!
That's worth the $20 in itself!
.... wow, that sounds like a testimonial, doesn't it? And, no I am not employed by TGM and no, I am not a relative or friend of Mike .....
..... just a satisfied customer.