But there's a ways to go before Tesla's products become ubiquitous. For starters, Model S owners have reported a range of glitches in online forums, including door handles that freeze (they're motorized affairs that extend out when touched), wiper arms that break (they exert tremendous force on a dry windshield and can be triggered by drops of sap), and a range of software glitches (perhaps to be expected given that the car is genuinely a computer on wheels). When Yahoo! Autos' editorial director Greg Anderson first received the Model S test car, it refused to drive for no particular reason -- then suddenly sprung to life. He also reported that the driver's door required a slam to shut properly, and the massive panorama sunroof made a grinding noise while closing.