Nearly everyday that I drive, I try to use the voice recognition in my Model S. To complete disappointment. If I attempt to say "drive" or "navigate" it doesn't work. Even if I use Siri through Bluetooth the recognition is horrible. I've finally resorted to disconnecting my phone from Bluetooth in order to use Siri directly and type the addresses where I plan to navigate. For reference, I'm from upstate NY (originally), so not much of an accent. Using Siri directly works perfectly. My only trouble with voice systems is through the car.