Garmin Nuvi 57LM is one of the best sellers navigation system on the market . It features a 5.0-inch dual-orientation display, it uses a Garmin Real Directions guide for landmarks, buildings and traffic lights and Foursquare that is a kind of POI in Igo Software to find for example restaurants or shops. Of course it has sound and visual alerts for streets, speed, speed limit and arrival time, scho...