Ditto this. I had a GPS along last week - when I turned it on, it put me in the middle of the ocean despite my being on a ridge top. Do not trust the electronics completely, they are frequently wrong for some reason and if you can't figure out why and re-calibrate the device (some GPS units won't allow re-calibration at all!) this is Bad News.

Maps are quicker to use since you can see the whole area and locate yourself on it in a jiffy without scrolling around on a tiny screen and hoping the map set has the trail on it (lately, none of the places I'm backpacking have the trails in the GPS - this is particularly true of Coe. Once you get off the roads the GPS is of no use in figuring out which trail to take at a junction.)