I did purchase one from them when I bought my Liberty. I didn't get a lifetime but got 6 years...90k miles.
When I took it in the other day for the rear window leak I left with a rental car. They had to order the part so I went back that afternoon..turned in the rental and took my Liberty. When the part came in a few days later I drove it in and left with a rental once again.
I paid ZERO for the repair or rental. I didn't pay a decuctable either.
Works for me.
It also includes a Road Hazard warranty as well.
If I take the car in for maintenance and it's going to be a few hours...yep...leaving in a rental.
I do not recall what I paid for the warranty at the moment.
Had it been through another company besides Chrysler themselves I would not have even bought it.