We were there last year from the 21st to the 24th, and will be there this year from the 20th to the 23rd. For us, it was fine, although not nearly as good as prior Christmas trips that predated FP+. We've been to WDW many times, and we had already done almost everything there was to do on prior trips (new Fantasyland being the exception). We arrived for rope drop every day, used FP+ (a disappointment compared to the old FP system, but better than nothing), ate meals at off times and didn't try to do everything. I would never advise making a first trip to WDW during Christmas week, but it's easy to soak in the atmosphere and skip some attractions if you've done them all before. However, we still were able to accomplish a lot - we went on all of our favorite rides and saw our favorite shows. It's certainly less crowded the week before Christmas than it is the week after Christmas. If you're not morning people, you may be very frustrated, because morning is when we were able to do the most - the biggest crowds don't arrive until late morning. FWIW, I did a lot of my trip planning just today, and while I was able to get the FPs we wanted, I couldn't get a single ADR I wanted in the parks (and I was not being terribly picky), so we'll be eating counter service. That's OK - I don't go to Disney for the food and we'll save a few bucks. The only FP I considered that wasn't available was the 7 Dwarfs Mine Train, and we'll just go there first thing in the morning.