I'm an inReach Ambassador. I really love it. One of the reasons I reached out to DeLorme was because it's a 3-in-1 device. It's navigation, SOS, and 2-way communication all in one. There are a lot of other devices out there that do one or two of those jobs, but not all three and not as well as the inReach (in my opinion). The only real downside is paying for the SOS/data subscription. That said, you can pay for as little as one month at a time. So right now my account is dormant but the device still works for navigation, just no SOS or sat-coms. When I get ready for a trip I just reactivate my account and pay for the month or two that I'll be traveling. The key feature for me was being able to text family/friends while I travel. Also nice being able to update social media for people that follow along on my adventures. It's also nice knowing the SOS feature is two-way and you can communicate the nature of your emergency rather than just a "send in the cavalry" button which can be very expensive. You can, for piece of mind, also get "send in the cavalry" insurance added to your plan just in case the shit hits the fan.
If you have more specific questions, let me know. I've used mine on all my trips this year. The only thing I never figured out was the weather feature. Looking forward to using that next year.