I finally broke down and got a GPS for the car. Haven't installed it or tried it yet other than turning it on and mapping out a trip around the block. I've had a GPS that I carry that uses my laptop but that's too cumbersome to use regularily.
Basically what I do is rely on maps.
Both of the doors in my Jeep have quite an assortment of maps I have collected over several years. Between my collection, Yahoo Maps, and Google Maps, and specific directions from a client, I can usually find a clients house with no problem.
Did I need another GPS?
Well obviously not, but I found a deal on a refurb TomTom that was reasonable. This model of course is not the top of the line. No MP3player. Like my laptop GPS, You have to enter in an address to your destination. The TomTom is easier in this area than I expected. As you are typing on the touchscreen it offers suggestions based on what it knows about you can select. Kind of like what happens in my web browser.
I suspect this will encourage me to use the GPS more often than my maps. However, the screen is small and the voice doesn't seem loud enough. That may pose a problem when it comes to deciding a place to mount it and how effective it is for regular use. But being as small as it is, it also fits in the pocket so it could double as a hiking tool when walking through town or just doing some exploring.