Many people think that TGM is going to spit out a fixed itinerary for your trip. This is not the case. Tour Guide Mike shares with you tons and tons of tips that help make your trip the best it can be. His best parks chart is the best!! His sample tours are awesome. We used his site for the first time last week, and we literally waited no longer than 10 minutes for a ride, and that was once or twice, for the entire week. I plan to use him each and every time!
Just be cautioned that there is a lot of reading. Many people get confused by just clicking on link after link, and then losing track of where they are. It's just so much information! Start with your AVP planner and go step by step. If you get lost or confused, ask on the forums over there. Everyone is very helpful.
Good luck, and happy planning!