Technology can be both good and bad; it can make your life easier, but on the other hand it can also make your life complex. The invention of the GPS Navigator have the same potential to cause accidents like cell phones. I heard they can really freeze up if you shift your focus away long enough, an accident may occur.
I dont have the need to own one because I prefer to rely on my own sense of direction along with my Thomas Guide. Last year when I carpooled with my friends who owned a GPS, I noticed the given directions can be quite confusing to follow.
So bottom line is, everyone who uses a GPS on a regular basis should use it with caution.