purchase this for my wife , who have trade in a vehicle with built-in navigation for a new vehicle that do not offer a built-in option . I have also have several vehicle with built-in navigation , include BMW , Mercedes-Benz , Audi , and Lexus . from a performance perspective , the Nuvi 350 work every bit as well as the built-in unit and at a very low price -lrb- comparitively -rrb- . the only `` nit '' that I can pick be : 1 . -rrb- I wish the navigation announcement could be louder - they can easily be drown out by radio or cd , and unlike built-in system the Nuvi can not interrupt the audio . 2 . -rrb- the power cord should be on a retract reel , like many accessory for laptop computer . as it be , the long cord be a little clumsy . but overall , the Nuvi 350 be a winner .