After over 10 trips, I find that I don't need to rely on the crowd calendar so much...I sorta already know what to expect and how to plan accordingly. For this year's Sept. trip, I think it may provide some useful current data for planning the closer I get to my trip dates. They do update often if their data shifts significantly. But I think what I like most about it is that it is a great place for me to store my plans, ADR's, notes, etc. I can go in and play with different park scenarios to get a better idea of timing of meals or breaks. It's a fun diversion until the big day comes!