plus I have get mine as a gift , so it be free for I . I start use the unit shortly after I have get it . it be a great little helper . I upgrade the firmware to the latest version with the WebUpdater . I live in the NYC metro area and I try to confuse it many time go from Jersey to NY and back , change route suddenly and so on trick but do not succeed . it be recalculate route every time I fail to follow the direction . it do a great job pull I out of a situation , in which I appear to be lose -lrb- if I be not look at the screen , but try to find orientation on my own -rrb- . I turn the WAAS option and with it be really precise with it -lrb- less than 10 ft -rrb- . here be a link , explain the option in detail : -lrb- ... -rrb- as a product it be very professionally packed and with all necessary connector and cable to work in the car and charge the battery at home . no print manual , but not a big deal . it be very intuitive to start with , so you would not need a lot of instruction . I give it 4 star because of the follow ... minus -lrb- two thing from the top of my head -rrb- \* the battery be li-ion and they be know for they 2 year average life , so if I need to use it in 3 year from now , the chance be I will not be able to use it without external power source . there be no way to change the battery , except if -lrb- my guess only -rrb- you open the unit up , unsolder the old and solder a new one on the board . \* there be not enough information about the commercial place like grossery and department store . yet there be enough space on the card to add they . when I first connect it , the free space be over 500 mb . I hope if there be a later update of the map , they will include all of the miss object .