Chicago Traffic Service, Pay for Clear Channel?


I was wondering if anyone has experience with the lifetime free traffic vs the paid clear channel traffic in Chicago? I know they have recently added sensors to a lot of county roads and routes but I can't figure out if there is much of a difference between the two traffic services since they don't provide a list of detailed coverage.

I searched the forums and the only posts about Chicago traffic service are pretty old, so I thought I'd bring it up.