the only reason this do not get five star be because it be not perfect , but it be very very good . when drive on some curvy back road in West Virginia it get a bit confused about the proper route and take I through a private neighborhood with only one exit , the way I come in . I be also search for a gas station while I be there and find that gas station it have list be no longer there and there be other that exist elsewhere . a little frustrating when the gas light have be on for a few minute . I have not experience any of these issue in Virginia , where I live . other than that , the detour button be helpful and have already save I a lot of frustration . I have also start be adventurous on my ride home from work let the gp recalculate the best route after each time I disobey its recommendation . additionally , you should purchase a 1 gig sd card to accompany the c320 because the new version 8 of the map software will fit all of the US and Canada on that one card . Perfect for cross country excursion ! I would recommend this to anyone want a high quality gp for a very low cost !