I have to agree, that is an awesome time to go! Lower crowds, cooler temps, and I love the Christmas decorations! We love to go then, just be careful not to arrive to early in Dec, we went 12/1-12/10, and stayed at ASMo, and the Cheerleaders were staying there. It made the foodcourt extremely busy, and all outdoor areas were always packed with teenagers. We never had any problems with them, it just made things a lot more crowded and noisier. HTH