even though i have been going regularly to wdw since 1993, i bought the TGM for my sept/oct trip last year.
i knew all of what he suggested. when to tour, what to avoid, which park to go to , that type of stuff. mike guides his readers to all aspects that will enhance their trip. he trys to help you avoid crowds, long waits and his opinion of best and worse/things to avoid at the parks and resturants.
what interested me was the annoucements i would read about prior to my trip. any changes made to ee or emh he would list. those type of tidbits were beneficial to my planning since i go solo.
also, the message boards he has are directed completely to the users and their questions about the parks/hotels etc. i liked hearing about their opinions.
i am going solo again to wdw this sept/oct and plan to resubscribe to tgm.
if you are a newbie, it is worth it.
if you are an expert, you wil get another slant on the world.
either way, it is enjoyable.