One look at the 2005 Cadillac STS, and you know why it's General Motor's flagship sedan and technological showpiece. Amid GM's lackluster lineup, layoffs, and continuing financial problems, the STS shines with its digital luxuries and power and has the makings of a genuine sales hit. More than a mere car for getting from here to there, the STS is an awesome display of technological mastery that's meant to show off Cadillac's skills at making the driver feel at home, safe, and in control. With a 320-horsepower V-8 engine, sophisticated all-wheel drive, radar-based cruise control, and a heads-up display that projects vital information on to the inside of the windshield, the Cadillac STS is the closest thing to an American supercar.

About the only safety trick that the 2005 Cadillac STS misses is that, unlike the Infiniti M45, it lacks a backup camera to display what's behind you as you're reversing the vehicle. However, the STS will warn you when the car gets too close to an object with a beeping sound, so you'll never scratch its bumper when parallel parking.

Expensive; absurd fuel economy and range; blind spot; interior plastics; some gadgets are too much.

Put a gas can in the trunk, because this car chugs gas.