I’ve owned many GPS units. (Old timers, raise your hands if you know what a “Garmin Yellow” is.) We’ve had mishaps on occasion. We even crushed one with the lid of our car truck (CRUNCH!) Our current dedicated GPS unit is a Garmin Map 60 CX. Color, rugged, can USB gpx files, etc. BUT, when we have cell coverage and need more info and connectivity we often use our iPhone. So the answer is “more than one”.
