A GPS device is only as good as its maps, so you need to ensure that you have the newest, most precise map data accessible before you hit the street. A Garmin GPS unit can take you pretty much anyplace, giving you turn-by-turn headings the whole distance. But, as old streets are shut down for development and new streets are assembled, those turn-by-turn headings must adjust to the consistently evolving scene. That is the reason it's important to update garmin map on a regular basis. With regular updates, you'll never need to explore without the most recent maps, applications and features.