Garmin finally got all that tech they bought Delorme for in a nice package. It doesn't do much stuff that I'd find useful that other's such as
SPOT have been doing for many years. The integration of it to other devices such as wearables so you can manage it through their UI is maybe the only unique thing about it.
While text messages are attractive, they are mostly preset messages you create ahead of time. You can make a custom message, but the UI is so clunky, it will take a lot of effort. AND, you have to maintain a subscription service to use them. But maybe the integration into other devices will let you get a better UI to modify and create text messages quicker.
Garmin's got a big sales force and marketing machine and has the potential to get this into the hands of more people than the other companies that have been doing it longer. But I wonder how many will push the emergency button just for a flat tire on the highway.