score:2
Ok. Let's start with some disclaimers. The information provided below applies to the US and Canada only, though most GPS devices including the ones listed are likely to have maps and ability to guide you in other parts of the world. If anyone tested this outside those locales please let feel free to update the answer as needed.
Upvote:3
I am a big fan of GPS for its positioning capabilities. When it comes to navigating, I haven't found a optimal app or tool yet. I actually developed a dislike of satnav devices. Usually the navigation steps appear to be very bad if you follow them in an area you know. So that might apply to unknown areas as well.
I might be old fashioned, but this one of the reasons I still prefer the good old map as ideal navigation tool. They provide the oversight you miss when navigating with a gps unit or route planner. Being a gadget lover I combine my love for good old maps and gadgets with OpenStreetMaps
Last year I actually lost quite some time following my gps unit in a mountain range in France. After 7 hours driving only 100 km I was so fed up that I search for a map on my iPad and found the Michelin Map of France. I find this a brilliant app. It combines telling you your position with the oversight a map provides. The app actually combines different scale levels, allowing optimal zooming.
The disadvantage of the iPad is that positioning is not done by a real GPS, but requires internet connection to give you your position.
I was told that Android tablets do have a real GPS unit installed. There are OSM maps for android.