I purchased this unit when my Tom Tom One 3rd Edition died and was immediately disappointed. For twice the price of my dead unit I found an item that was incomplete, harder to use, and didn't have features that I considered extremely useful.I call it incomplete because to register the unit you need a USB cable that is not provided--after much frustration I discovered that the USB cable sent with the Tom Tom worked with the Nuvi.Two extremely useful Tom Tom features that are not on this Garmin are the map-correcting feature and the 'demo' feature. The demo feature allows you to 'test drive' the route at high speed with actually moving--the unit does the turn by turn as you watch. The map-correcting feature allows people to add/change/delete map items (like Gas Stations) on the map and upload them so others can download them for free without waiting for a new map to be published.