I'm semi-guilty of relying on my GPS, especially when doing a house call for someone, and it really is a convenience. But I can't say that I've ever gotten lost because of mine. That, and I absolutely abhor being late for anything so I always leave with plenty of time to get where I need to. I kind of feel that navigating by map falls under the same realm as knowing how to drive a stick, e.g. something that's nice to know how to do when you're up a creek.
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