this portable gp be very intuitive , quick and easy to use . after some experience with several pocket pc base gp program , a few portable unit , and OEM install car navigation the Garmin 680 be the easiest to use . the screen be bright enough to see in bright sunlight and change automatically to night mode -lrb- if option be select -rrb- but you will most likely have to manually darken the screen some more if travel in dark area without street light . the traffic delay information be hard to read and I do not think very useful . perhaps if you pull over , stop and study the map with the red slow down area you might be able to select a alternate route . it be not obvious at a glance if it even cover the road and direction you be travel . the shopping and restaurant guide work great if you be very close to the area you want to find they . look for a restaurant fifty mile ahead in a different city be not easy -lrb- unless there be some function on the unit that be bury in the option -rrb- . if you have more than two place to go this Garmin can not create the most efficient route for you . the first two week I have the unit I use it in Hawaii , the West Coast , and Maryland and never have to refer to a paper map . there be only one spot near the Baltimore airport where I miss a turn because the instuction from the Garmin be a little confusing . a word of caution , it be very easy to get so dependent on the Garmin that you can not make it to you local grocery store without it .