I used to have that same tire spinning problem with my pickup. New tires didn't fix it, I finaly discovered if i drove it like I had some sense it would go down the road much better...
On a serious note. I am concidering one of these for my wife. I am disapointed to find the somewhat major repairs so soon, At least it was waranteed.
We will want to run b100 in it. I have heard Jeep will only state it is good to b20. Any info on that.