I have a friend who owns a tomtom and he constantly has to hook it up and recharge it and remount it in his car. This application alone purely beats the price and offers very accurate navigation. Can chew through your battery, although I have a G1, so I would suggest buying a car charger if you want to be able to use this alot. If you're in a bad reception area it can take a while to track your location, but if you're driving around this shouldn't be much of a problem. Remember to keep your eyes on the road and hands on the steering wheel!!