I have taken this tour and trully enjoyed it. KTTK is still my favorite, but this is right up there. There is a lot of walking involved, but so much information on EPCOT and Walts ideas about the park.
We got to go into a special room for a certain companies guests in the Mission Space building, backstage under Test Track and no waiting on Soarin'!
They should have a special tour for the World Showcase...