TPMS-a life-saver (and the handy 12-volt trunk outlet))
Forgot to mention how much of a potential life-saver the TPMS can be if you run over a nail or screw. Just this summer noticed the dashboard light shortly after leaving a driveway on the other side of town. Quickly pulled over down the street and looked closely at each one of my tires and heard a hissing noise. Rolled the car forward a little, and sure enough, saw the shiny screw which had lodged itself deep in the tread. Was able to find a tire repair store not too far away. They were able to easily and inexpensively fix the puncture. Really appreciated not having to find out my tire was in trouble until it went completely flat and ruined the sidewall and possibly the car (and me) in an accident. By the way, if you have not found it yet, there is a handy 12-volt plug in the trunk of the 07 Optima, on the lower right hand side, which can be used to plug a portable tire inflator into (a highly- recommended item for the trunk.) A very thoughtful feature, indeed. This outlet stays powered, so the ignition does not have to be turned on and off.