[markem]

So you didn't find a GPS problem, but a user problem. This is a well-known problem with GPS systems.

Me, I use google maps to print maps for areas where I want more information. You can also just load something like MS Streets and Trips on a laptop and use that. You can also connect your GPS (if portable) to your laptop and use that.

I used to rely heavily on my GPS when wandering through the Coast Range but always had a paper backup plus a compass - once a mountaineer always a mountaineer, I guess. I leave the altimeter at home, now that I have that function in the GPS.