I only ever travel solo, whether hiking or in my Jeep or anywhere else. Much of that is beyond cell service. And although I am a stickler for preparedness, accidents can happen nevertheless. I take a Garmin GPSMAP 66i with me, which is a combo of GPS mapping, sat messenger, and emergency beacon. The emergency feature, for me, is strictly for absolutely dire emergencies where I cannot physically walk/drive/etc out of the situation under any circumstances (aka: I've broken both legs and am laying immobile in a ditch). And the sat messenger is, for me, intended for things like: 'my Jeep broke an axle and I need to contact a friend to call an off-road recovery company to tow me out.' I've never had to use either.
The few times I've encountered problems in the wilderness, I generally had the tools necessary to solve them without needing the beacon. Carrying a beacon isn't enough, in my opinion. Gotta pair that with self recovery tools (in the case of an overland vehicle... winch & winch kit, tow strap, shovel, tool kit, spare fluids, etc) and survival gear (water, shelter, first aid kit, firestarters, etc).
But nevertheless, I like the peace of mind that comes from having a way to call emergency services in the event of an actual, serious emergency. And the Garmin was the best choice for the sort of stuff I do. I have it mounted above the dash, within easy reach, in my Jeep when I'm in the backcountry. And I clip it onto my backpack when hiking. Lightweight, multi-function. My only complaint with the 66i is that it doesn't use regular AA batteries like my old Garmin did. It's USB-rechargable, which is fine for in the Jeep where there's an easy charging access, but less ideal deep in the backcountry on a multi-day hike. But that's the only real downside.
Also, there's the helpful ability with Garmin sat subscription to only pay for the months you need it. So if you're only going out a few months out of the year, you don't have to pay for the whole year.
Before the Garmin, I was using a SPOT X beacon. The subscription was about the same price, but it didn't offer as many features as the Garmin. You couldn't send custom sat messages, only ones pre-programmed in. And no GPS mapping capability. It was a lot cheaper, though, for the initial purchase. So that has it's appeal as well.