There can be dead zones and jammers, for sure, but I was able to track my wife in real-time as she traveled two thirds the way across America to watch the total eclipse and visit a friend.
I know it's not a perfect solution, but it's way better than nothing.
If I'd of had one hidden on my last motorcycle, I might still own it, as the police acted fast on looking for it in two cities, and they chased it a few times when the thief was out joyriding on it like a madman, but they never caught the thief (it was a ZX-14R with 207hp where the wheel meets the road).
It might even lower my motorcycle insurance by having on on my motorcycle. I have top-tier full-coverage insurance that includes theft insurance, and they always ask if I have an alarm or tracker on it. I'll have to look into it.