In-Car GPS Review

Slate has a review of five aftermarket GPS-based in-car, dashboard-mounted navigation systems, focusing on setup, screen size and, if you can believe it, how nice the robotic voices sound. None apparently stand out from the others in terms of accuracy of directions; which doesn’t surprise me, but I’m kind of curious to know whether they as a class are any good, or whether voice-actuated directions, as a concept, really work.