We loved it. I recant what others have said about the crowds...thanksgiving day we stayed out of parks (planned a full day at fortwilderness - just hanging out and driving around in a golf cart - after going to Mickeys BBQ for our Thanksgiving meal)
I was shocked at how dramatically the crowds reduced after Thanksgiving weekend. The Unofficial Guide mentioned we would go from a '7' crowd index (highest being 10) down to a '1' the following monday and they were right!
Which is why this year - (YES we are going back) We are planning to arrive Thanksgiving day...and stay for 10 days extending AFTER the holiday.
We are also renting a villa offsite....because we bought into the 'needing the constant magic' line for our first trip - and as Ive posted before...the cramped buses didnt feel too magical to me on some days...We stayed at POR..and although you could get on a bus and have it be totally empty...the drivers inevitably drove around and filled the busses to MAX capacity...which with two small children just was doable...but didnt feel 'vacation-like' to me....I want to be pampered on my vacay ..If I want to be cramped on a bus I can do that at home.
Aside from the dumb busses...we really did have a marvelous time.