I'm going!
I was there on a quick 2 day solo trip (business, with a couple of days of disney tacked on to the end) back in September and am going Nov 16, 17 and 18 with my folks, my brother and my 6 year old niece. Can't wait! My niece has never been before, and none of the rest of us have been there during the holiday decor, so I'm pretty excited.
I did experience the Nightmare Before Xmas HM overlay for Halloween time when I went in September, and I presume that this is exactly the same for the Holidays?
Anyway, I'm not sure what to expect crowd-wise. We'll be there over the weekend so I'd guess fairly busy, but hopefully not as busy as Thanksgiving weekend or earlier in the year during summer vacation.