I like them in cars, but not for directions or talking. I don't drive myself, but having gone on roadtrips with friends who have them, I find them useful for being able to quickly figure out where exactly you are. Also handy for when you have to make a quick pit stop for food or supplies in an unfamiliar area. Directions? Nah. Honestly, these often distract and confuse more than help - road signs more than do the job for that.
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There are only forty people in the world and five of them are hamburgers.
-Don Van Vliet (aka Captain Beefheart)
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