Given that I use it in my motorcycle as well as my car, it would doubly apply, except that if I have to do anything requring ANY attention I generally pull to the side of the road or into a parking lot, reorient myself, and then continue when I know where things should be the next 5 minutes at least and repeat as necessary. If you know the destination you can usually plot a route (and with the street images it becomes easier). If you don't know where you're going, maps won't help.

My other point also still stands - the only use you can possibly think of for the GPS is routing while driving. There are other activities which a GPS is very helpful that don't involve speaking directions. So in any case it is not useless for those applications.

I've also gotten the "directions" where they lied. Google Maps. There is no exit 105 on northbound I-35E (I passed the one they might have been referring to, which was 104b or something). So I pulled off, got the map application out, did a little zooming, and found the set of roads I needed to get back on track.