![]() We assess the quality of the voice, timing of turn and other instructions, how clear the instructions are, and whether it's possible to rely on verbal instructions without looking at the screen. ![]() We look at how easy it is to use the menu structure on the touchscreen and, where supplied, whether it's necessary to use a stylus to navigate the menu. We assess how useful the GPS's instructions are, how easy it is to attach and remove the unit and whether it vibrates during travel. Note: models and apps tested before 2021 used different regional locations. The total of the predicted distances is calculated the more accurate the predicted distance (compared to a reference map) the better the score. ![]() Our tester selects various regional and city locations, and performs two sets of distance calculations for each location.
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