As is the case up north where we go. Cell Service is spotty to no-existent. We have a Landline at the Cabin. We use GMRS there for Mobile (auto and pontoon) for general chatting and contacts.("lunch is ready", "how's the fishing?", "Grab some bread and a dozen more minnows.")
Were we to need help, 911 is right there to call on the LL. And if perchance the LL is down, there's a couple of pretty good 2m repeaters I can hit with better than average chance someone is listening. In the 8 years we've used GMRS up north, I can count on one hand the number of others using it that we've heard on the air, and definitely have never heard any traffic on 19 or 20 when travelling up there and back, or while in the area.