Usually I choose not to get extended warranties. However, in the case of our car tires, I'm glad we did. I accidentally destroyed a tire this weekend when making a left turn; the lanes of the street I was turning on to were narrow, and the left back tire of the car hit the median curb. But the tire's destruction was covered under the extended warranty since it was "road damage", and we left the tire shop only $15.00 poorer instead of the $100.00 it would have cost us otherwise.
And can I just say how cool my dh is for putting on the spare tire last weekend!