I get it for the serious back country off the pavement crew. With the zillions of map apps for phone/offline google maps etc is there still a reason? I travel mostly in areas without cell signal (central NV) and use the phone offline mode without problem. Yet seems like every post I see of someones rig, it has a unit on it. For those who mostly pavement and hit a fire road to the camp site, why do you still use a dedicated unit? I assume some have them from pre phone days, but would you buy one again today?