some bad point : 1 . -rrb- the manual for the Magellan Road Mate 3030 4.7-inch portable GPS Navigator be hardly a manual at all . it lack basic simple instruction on how to use it . whoever be in charge of documentation should grab one of the Garmin or Motorola manual and learn how manual should be write . for the price one pay for these unit , Magellan should be able to afford to hire a better writer . 2 . -rrb- the unit lack a save function\/button after correction be make en-route during trip which have be incorrectly plot by the map system in the first place . it refuse to accept correction and keep reroute one via u-turn . later trip use the same start point and destination provide route with the same error . 3 . -rrb- the unit when purchase have NAV map , as show in the product description , and when that same product description be visit one week later the map be change to tele-atla . I be wonder whether it be legal for a company to switch the map system without notify consumer . 4 . -rrb- Magellan Road-Mates restrict registration of they unit to Windows Explorer browser and doe not allow you to register if one want to use other browser . and some good : 1 . -rrb- the screen be large and very clear . there be a variety of customization option like navigation and map settings\/preferences , auto-setting , and nice keyboard layout . 2 . -rrb- the speech be relatively clear when the volume be increase , although it suffer severely at time in pronunciation of certain letter and combination of letter . 3 . -rrb- Advance warning of upcome turn be well place and quick although call the bend on the SAME road should be eliminate . they confuse one about upcome actual turn . a bend in a road be not a turn , and cause the driver to look for a upcome turn \* off \* of the current road , which be what a turn mean . 4 . -rrb- I be give this unit a b - grade .