fantastic unit for hunting , hike , Christmas tree search , etc. . we hike in the mountain and you can take waypoint as you hike then go to Google Earth and look up exactly where you be . Works the other way too . input you waypoint and then tell the unit to navigate to it . check the accuracy of you speedometer . fun to use geocach too . there be thing I do not like . it have the older chipset that lose signal easily . I have to put the unit on my dashboard because it lose signal in any seat of my car . I also wish it convert coordinate to decimal easily but it only use standard gp coordinate . I have to do a conversion each time from Google Earth 's coordinate . there be some roadmap but only major street in most city . do not use this for address navigation because the map be not very detail . wish it use a usb connection to a computer but it be use older serial port so many new laptop will not interface to it . also , you have to move around for compass to work .