As others have said.....it is the busiest week of the year. Personally, we did it once.....and will never go that week again. But, it depends on what your family's vacation choices/preferences are......as others have stated...they love to go during that timeframe. I truly do love to see all the decorations, Christmas shows, etc. and we also have gone earlier in December to take advantage of those things.....that I would do again.....unfortunately, with our family work/school schedules (DH and I work at colleges, as does our youngest son and our oldest is currently in law school) early/mid December just doesn't work with semesters....the only family member early December works is our daughter. We have recently been going the first week of January....actually sometimes arriving on New Years Day......which, depending what day of week NYD falls...the first few days can also be very busy in the parks, but, not nearly as bad as the week between Christmas and NYD.