Having leased over 4 Jeep Grand Cherokee's in the past 9 years, I find driving this vehicle extremely exhilerating besides, I have only had it for a week. Spending time at the pump was never an issue because I was always averaging 16 miles per gallon in the other vehicles. The navigation system is a great and sharp. I have not tried the TV in the back because I'm usually driving the vehicle.
I just traded in my 2007 Jeep Grand Cherokee SRT8 for a 2008. Wow they made a lot of improvements for 2008. The engine and performance is astonishing. The ride quality is pretty darn good and the over all quality is great... I had almost zero issues with my 2007. If you like speed, and want the utility of an SUV this is the one for you!