dosn't your car have a 5 year 100,000 mile warranty???
my 05 cobalt is doing fine, i bought it on november 28th 2009 with 77K miles on it and 2 previous owners.
today my friend tried to open the front door and it wouldn't open
we locked the car, then unlocked it, then repeated until it would open.
The gas mileage thing on the dash says i get around 22-25 mpg but i only drive on city streets and it says my average speed is 30. so it sound about right but i wish it was more.
i have no warranty but sense it will probually be some what cheap, i might get one for a couple years so when i sell it the buyer can have something to look at.
i suggest that you get one too, could be a waist of money, could be a life saver, but either way it is a gamble. do some research and develope your own opinion; but if you do get it and you sell, that will make the buyer by it fast as hell.