Problems included a penchant for picking up dirt and fingerprints (the price you pay for a beautiful glossy face, we suppose), a cramped nav key layout with the tricky touch-sensitive Navi Wheel front and center, audio performance that wasn't bad but was expected to be far better in light of the dedicated DSP, and a "shovel"-like feel in the hand, a symptom of the phone's generous dimensions.

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Run on an eight-inch screen with a similar screen faceplate behind the steering wheel, the Cadillac User Experience allows touch-based feedback (see the demo in the video above), vibration-oriented lane departure warning and (finally) a recognition program that responds to normal spoken requests for directions or music.

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Its novel touch-sensitive display is reminiscent of the iPod's nifty scroll wheel.

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The Storm posed a special challenge for RIM because the company's operating system had always been tailored to a keyboard and click-wheel or track-ball for navigation, rather than a touch screen.

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Standard features include leatherette seating, a 7-inch LED color-touch radio display, automatic climate control, remote start, power windows, steering wheel radio controls and no less than 10 air bags.

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Garmin K2 features a 10-inch glove-friendly multi-touch screen at the center of the dash and a digital and reconfigurable 12- inch instrument panel behind the steering wheel.

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