I be cetainly happy with the c340 . however , I find use the suction cup offer I some difficulty in area of crime -lrb- they want to steal it -rrb- . sooo ! I fork out some dough for the dashboard weighted mount , which be easier to dismount and stuff in you notebook case , case solve ! . seriously , this gp be wonderful , and if you make a wrong turn , it will give a correct head , to get you home or another destination ...