I found it so helpful for my planning! Made the most beautiful perfect plans using the crowd predictions and historical data.....
Not that I'm here, I have to say, it's been utterly useless. Even the posted wait times are usually wrong, they have often not matched the wait posted outside the ride. And the actual waits have been way off as well. With crowds being so all over the place this year the crowd calenders have become irrelevant.
I payed for both the WDW and Universal subscription. Universal was the most inaccurate information this week (in my experience)