I've had this car, as second owner, for three years. It has never been a problem. All I've done is replace the brakes and tires. It's still got less than 35K miles, but so far this is the best around-the-town car I've ever had. It is surprisingly fun to drive, handles great. Downsides: I don't get the mileage I thought it would get - seems like I fill up a little too often. At about 30, I can feel the gear shift. There is absolutely no style to this car - it is super generic. These things don't detract from how good the Optima is.
Everything about the driving. Excellent radio in the base model.
Styling is terrible, but new models are lovely. Cleaner shifting.