Hi!
I have gone in the first week of December and it is incredible. You have all of the Christmas decorations and no crowds!!! Also, when I went in 2000, each of the countries in EPCOT had their version of Santa. He would come out periodically and tell all of the kids (& big kids) about his traditions. My nephew was very fascinated with it. Vatmark, the second week should be the same as the first week. So you should have a great time. The only draw back to the beginning of December is that the weather can be iffy from a temperature point of view. When I went in 2000, it actually was cold with highs probably in the 50's and low's in the 30's or 40's. A friend of mine went the next week and it was in the 70's. That being said, I had an awesome time and it was still warmer than here in New England.