My problem with the WeatherTech cargo mat is that it is too short. It will not cover the back of the back seats when they are folded down, which is the way I run my Cherokee most of the time. Also, they either need to be removed or lifted to access the storage area or the spare tire. Not the best design. I like Mopar's Cherokee cargo liner much better. It folds up and takes advantage of the Cherokee storage system as well as covering the backs of the back seats when folded down.
Ordered some of the cargo options yesterday and one was the liner. Glad to here it covers with the seats down!