My consensus of one says get it.
A) The first year of any brand new model is risky. Lord only knows what will break after 3 years. Look at the number of TSB fixes that came out for the WJ and then the WK. Some of those TSB's were applicable to models that came out 5 years before the TSB. No extended warranty means you have to pay for those repairs. Fixing the blend door problem on the WJ's cost as much as the extended warranty does. Plenty of people are driving WJ's without properly functioning AC/Heat because of this problem.
B) There is a lot of equipment on the WK2. More to break.
C) This is a heavy AND fast vehicle, and the driveline/suspension/brakes are stressed much more than, say, an Accord.
D) I change my own oil, and because of that, I'm under my Jeep a few times a year. I always look for leaking seals, and can almost always find someting (Diff, Axle, Transfer Case, etc). If I had to pay for these repairs myself, I wouldn't do most of them. I'd just keep topping off fluid. The extended warranty gives you the luxury of keeping the Jeep in top notch condition throughout its life. This will extend it's useful life, and improve resale. All the warranties up to 7/100 are transferrable too, which has got to make the Jeep much more attractive to potential buyers.
I'm getting the lifetime warranty. I just wonder what they're going to do when say, a nav unit is no longer available 10 years down the road
Extended warranties probobly aren't nearly as good of a deal for other cars (on my wife's, it would have been a waste), but for the Jeep, it's a good deal.