The voices in Charlie's head are nothing compared to the cacophony coming from his dashboard. Take a look at this video, where you can hear the voices of four GPS units as he test which tell us to turn soonest. The smooth-sounding male voice is that of the Honda Civic Hybrid's built-in GPS unit, the robotic male voice is the Garmin, the smooth and sexy-sounding female voice is the Cobra NavOne, and the other female voice is the Mio. Between all the yapping, its hard to tell which one was a better backseat driver, so hit up our full reviews here.

GPS Gang Bang [Giz]