Due to family health concerns and the desire for emergency communications while in the backcountry (bush) during our upcoming Northern Canada/Alaska trip, I purchased a
Delorme In-Reach and have been testing it out over the past month.
The In-Reach provides two way satellite SMS (text) messaging from anywhere in the world that there is a clear view of the sky via the Iridium satellite constellation at a much lower price than a traditional sat phone (this is much different than SPOT or a PLB). It allows family and friends to follow along by sending out a link to a map that shows your exact location, has a tracking feature (someday, I should tie it onto my dog to see where she wanders), a social media link (personally not interested), and a web page that shows your travels. It can also be remotely pinged so other people can see where you are without your having to initiate a contact. And, of course, it will send a emergency message to the local PSAP (emergency coordinator....err. 911). There are three programmable canned messages that are free to send out as many times as you wish, you just need internet access to program them. A number of quick messages that can be pre-written to save typing time (nice when running away from a bear....or mosquitoes:)) and of course you can type whatever you want into it whenever you want. Entering text is a bit laborious, but you can use a computer (via USB) or smart phone (via Bluetooth) if available.
My conclusion....well worth the purchase price ($299.00 retail...but sometimes on sale) and monthly subscription charge ($15.00 per month for the base plan that you can activate/suspend at will without charge).
I recognize that most folks on this site don't need these capabilities, but for those that might, this product would be worth looking at.
Note that I have no relationship with Delorme or any of it's affiliates (if any). Just sharing what I have learned about this product.
Safe travels.