The important thing about any sat-nav is the quality and accuracy of the mapping. The review should include the cost and frequency of map updates as well as the accuracy thereof. There's nothing worse than finding you've been taken on a nice-looking short-cut round the back streets only to find the council blocked the exit, changed the one-way direction, or restricted a vital turn. Try convincing most sat-navs that it has to find another route!
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It's the mapping, stupid!
The important thing about any sat-nav is the quality and accuracy of the mapping. The review should include the cost and frequency of map updates as well as the accuracy thereof. There's nothing worse than finding you've been taken on a nice-looking short-cut round the back streets only to find the council blocked the exit, changed the one-way direction, or restricted a vital turn. Try convincing most sat-navs that it has to find another route!