We're big fans of the InReach. Used it last year as a test for this year's Downeast Loop trip. We've already got everyone at home following our tracking page, and the guys at my (former) work have already figured out how to send messages from that page.
Fun stuff, but the real benefit is the security of world-wide, two-way emergency comms.
Likewise, the ability to text when out of cell phone range is a real benefit these days. I can live without it, but everyone shoreside is so accustomed to instant contact that they get worried without it.