Im assuming you're talking about a Cherokee Trailhawk (there was grand Cherokee Trailhawk edition for a little while also).
I took mine on a central Australia trip and it impressed the hell out of me on the dirt out there. Only thing I'd changed is putting some all terrain tyres on it (the original tyres are road-oriented).
For off road work, I'd love a set of rock rails for some extra protection due to not having enormous ground clearance...
Generally though, they're pretty handy out of the box - the vid below isn't a bad demonstration: