Crowd Estimator Sites

[Coasterfreak18]

This question is regarding those websites that have live crowd levels and wait times as well as future predictions of future crowd levels and wait times. For those of you that use these sites, which ones (if any) do you find to be the most reliable/accurate/dependable for planning future park trips?

[tndank]

I research queue times for same weekend last couple years.  And look at Fast Pass and ticket prices.  

[AmyUD06]

Honestly I don't use crowd estimators to plan trips, but I find queue-times.com to be pretty accurate for tracking both real-time and historical queue lengths, at least for CF parks.  They pull data from the parks' apps, so as good as the data going in is, is as good as you're going to see.