Len might not love this full answer ---
I really like touringplans, I think overall it is WELL worth the subscription price. For the cost of less than 1 counterservice meal at Disney, for the cost of a pair of Mickey Ears -- You get a ton of useful stuff. Lines app, recommended touring plans, customizable touring plans, AND the crowd calendar.
And I do use the TP crowd calendar for its raw data... BUT.... I use it in conjunction with easywdw.com. While TP spits out numbers.... and rather useful numbers, easywdw's calendar combines it with real discussion and advice, which is invaluable.
For example, both easywdw and TP may recommend against Magic Kingdom on a day with evening EMH... but easywdw points out that the morning at Magic Kingdom could be an excellent time to tour, since the EMH crowds will arrive later.
Easywdw will give you advice about "what if you want to see the parade" and will tell you the best day to see the parade. So you can make a judgment call, about if you are willing to sacrifice the parade or not. If you didn't care about the parade anyway, you may simply take the lowest crowd day. This type of information is easily available on easywdw, but not apparent on the TP crowd calendar.
So assuming easywdw and TP aren't going to be joining forces any time soon, I highly recommend that people use both.