I buy this Garmin because it seem like it would be easy to use . my daughter have a 350 and she love it . but I do not love mine . it only hold a charge for about 2 hour , it do not come with any external battery charge except a vehicle power outlet cord and when I plug the GPU unit in it immediately go into charge mode and will not operate . same thing when I plug it into my desktop comptuter at home -lrb- with a usb cord from my camera , since one be not supply with the Garmin . -rrb- when it be charge , I can not do anything else : no naviagaion , no download waypoint , nothing . plus , it doen ' t know where anything be ! it send I way out of my way or onto dead end street try to get anywhere ! I do not know anything about other GPS unit , but if they be all like this , who need it ?? I 'll just go back to my old way : highway map and print out from Google map -- they be more accurate anyway ...