this be a great unit . I purchase the TomTom go 910 because it be preload with map of North America and Europe . I be in Europe more than the USA so I want a unit that could get I around all the european country seamlessly . many unit require that you switch european map between country , but not this unit . I can report that the unit work perfectly . I recently drive from Lyon , France to Torino , Italy and then to Cameri , Italy . the unit work fast to define the best route and get I to my destination without any error . in fact , in Torino I go to a friend 's apartment follow the direction exactly . when the unit say `` you arrive at you destination '' stop the car among large building downtown and phone my friend to see if he know where I be . he look out he apartment from the fifth floor and wave to I ! the unit place I directly in front of he apartment . and yes , it never lose signal even when on the narrow road bury between tall building . I also notice that in the small town of Cameri , Italy it know every small road in town . it be also interesting to note that the unit track you approximate location even when go thru tunnel -lrb- I have no signal but it apparently assume you be still go the same speed -rrb- . but after a few minute in the long tunnel it stop and wait for you exit and then refresh in about a minute . here be what I really like : \* it be very accurate and calculate route very quickly . if you make a wrong turn , it recalculate in second and get you back on the right track . \* Preloaded map of Europe , and they be accurate . \* alert you if the speed limit drop and you be go too fast . in fact , I be watch it change as I pass speed limit sign -lrb- in Europe -rrb- , and the go910 change within foot of pass the sign -lrb- how do they do that ? -rrb- . \* alert you to speed camera -lrb- in Europe -rrb- . \* have a remote control that be very handy . with the touch of a button , you can have it repeat its last instruction or tell you the next instruction . also can change volume and access all the other feature . \* signal strength be very good . I pick up nearly full signal when dock in my house , apartment -lrb- in Europe -rrb- or office . of course , I have great signal strength in the car , even though I have one of those GM car with the metallic coating in the windshield -lrb- my old Garmin GPS III unit would not work well thru the windshield -rrb- . \* Long battery life , more than six hour . \* Speaker and sound be very clear . \* when you plan you route , it provide a estimate of arrival time . I find on a six hour trip it be within three minute . here be what I do not like : \* the screen be hard to see in really bright sunlight and you be wear sunglass . lift off you glass help , but it be still tough to read . \* the windshield mount work fine , but the power connection from the mount to the unit be not work -lrb- the unit run out of battery after about six hour -rrb- . \* do not come with a carry case . sure it have a little case for the main unit , but if you drop it there will be little protection from a hard floor .