I have just over 70K on my 08 KK.
I purchased the lifetime bumper to bumper warranty or I think the call it the Maxicare Warranty. I think I paid around $1,600 for it.
About a year or so ago, I was getting an oil change at the place that normally changes my oil and the guy told me that I had a leaking front strut. So I got the front struts replaced under the warranty.. my cost - $100.
This past week, my son was driving my KK to come pick me up. The little battery light lit up. He parked the car and when we went to get in it, it would not start. So we called the number for the Maxicare roadside service and had it jump started and drove home.
On the way home, the battery light was going on/off and every other warning light was going on and off on the dash, and finally the check engine light came on and stayed on. We made it home and parked it.
The next morning, the car would not start again. Again, I called the number for Maxicare roadside service, they came and jump started it and I drove it over to the Jeep dealer.
So I tell the dealer about it, and also tell him to do a transmission flush/filter in while I'm there.
So he does the transmission service, calls me and tells me that while he has it up on the rack that he notices that my water pump is leaking, but that is covered under my warranty, and that I have a bad alternator and that is also covered under my warranty.
So I get a new alternator, new water pump... my cost - $100
Plus $179 for the transmission flush and filter.
Oh, and the warranty paid for a rental car for me for 2 days while they worked on my Jeep
So far, I think my warranty has worked pretty good for me.