On the other hand, it's sometimes a problem that you 'trust' the taxi driver to know the best route, since there's no guarantee they're actually using it (if yo

On the other hand, it's sometimes a problem that you 'trust' the taxi driver to know the best route, since there's no guarantee they're actually using it (if you're in a strange city or going somewhere unfamiliar). I honestly prefer they use a GPS because at least then I know the source of their choices. Sometimes that means it takes a little longer to get there, but I'm comfortable with that tradeoff. YMMV.