We just got back from our first trip to WDW and used Tour guide mike and the unofficial guide. If you've never been before, or havent been in 20 years than I would recommend Tour Guide mike, his touring plans were easier to follow than the unofficial guide and worked really well for us. His directions from the airport were great as well.
If you've been to disney more than a couple of times recently I dont know that TGM will tell you anything you dont already know.