I got an eye roll and a sigh from a younger fellow when I told him we use a Garmin GPS when traveling along with paper maps. I told him we use the phone for trips around cities but out in the boonies it simply doesn't work, especially if you want to change your route because the road is closed or whatever. He travels all over the world but never leaves coverage it seems.
The wife insists on verifying GPS directions with the paper map. Haven't caught any big mistakes yet, but sometimes the algorithm can choose an odd path with many turns to save a couple of minutes or miles. OTOH, we've found some interesting places that we would have bypassed had we stuck to what looked like the obvious path on the map.
Best thing about GPS is comparing its distance to a town with a gas station to the range display on the truck when far from civilization. Comforting.
Alan