GPS can be quite challenging for people that don't study up on them. Are your parents 'computer literate'? GPS devices aren't really that hard to understand unless you are from a different generation and somewhat technologically 'challenged'. The GPS units used for automobile applications are much more user friendly for people that have never used them.

With that said, I have a Magellan Sport Trak that has worked pretty well. Not the most user friendly, but reliable, accurate and cheap. Would probably do the trick perfectly for their application. (Hiking, etc.)

My grandmother bought a new Sony big screen tv, DVD player, blah blah blah. She calls me twice a week telling me her tv is broken. For some reason she doesn't quite grasp the idea of all of the 7 inputs the tv has and the fact that you have to hit a corresponding button first, then tell it what you want it to do.(tv/cable, dvd, etc.)