I believe the Tom Tom you have to pay for a service. The Navigon and Garmin (in the later models) offer it for free, but there are advertisements you have to put up with (in the Nuvi) and its not as accurate.
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I believe the Tom Tom you have to pay for a service. The Navigon and Garmin (in the later models) offer it for free, but there are advertisements you have to put up with (in the Nuvi) and its not as accurate.