The one thing I meant to imply was that it isn't about "long trips" or "unfamiliar areas". I think there is a false perception about "driving patterns" and navigation systems.
My example about using it to get home even in my own city was supposed to show that I use it on short trips in familiar areas. Obviously, familiar and short are relative terms. In other words, I use it much more than I thought I would and I've been using it since 2001 so it isn't just the novelty of the thing talking here.
Just the other day, for example, I found out at the last minute about the need for me to visit a funeral home less than 10 miles from my house on a very long and busy road. I looked at the address in the death notice of the newspaper, dialed it in, and the car took me there perfectly. Without nav, I would have had to do more research to figure out exactly where on this busy, familiar road it was or I would have tried to find it myself which would have taken my concentration away from driving on such a crazy road.
Just for the sake of argument, let's say while I was there, I realized I needed to find an ATM to get some cash to pay the babysitter. Nav can give you a listing of all ATMs near the current location. You can do the same for gas stations, restaurants, etc.
Again, I'm not suggesting I couldn't have found it without nav, I'm just showing that it isn't all about long trips or frequent travel. I personally don't take too many long trips either. As a matter of fact, it seems like every time I take a long trip, it's with my family and we drive my wife's (navless) Town & Country. The entire time I'm sitting there wishing it had navigation!
Sooner or later, you will own a car with navigation. Once you do, you'll probably wonder how you got around without it.