Hello,
I bought a SPOT 1 back in 2010. I used it for years for tracking and checking. Never for emergencies (thank goodness). It worked well for friends and family to know I was OK, when to expect me back, etc. IMHO the main shortcoming of the SPOT tracker was that communication was one way only from SPOT to the world, there was no way to receive information FROM the SPOT.
Last year I learned about the SPOT X - a two way satellite communicator. All of the features of the original SPOT with the ability to receive text and email. The price was good and the subscription services reasonable. I did some research on the InReach but I decided to buy a SPOT X. I played around with it at home and used it on the Around Long Island Regatta. I was able to communicate when we were 10+ miles off shore, out of cell phone range. It worked fine for that and the tracking feature worked well too.
My complaint about the SPOT X is that the keyboard and screen are both small - like an old blackberry. I had mounted the SPOT X on the cabintop - out of the way of being stepped on, but with a clear view of the sky. But this meant I needed to go to the SPOT to see if there were any messages. The Inreach products pair with a phone, so you don't need to have the device on your person.
Anyway, I learned that SPOT just released the SPOT X with blue tooth. This version can pair to a phone so you can send and receive message from your phone. This is great - you can use the phone address book, large screen, easy editing, voice control, etc. And you can still use the SPOT X if the weather is too bad to use a phone. The SPOT people were nice to me and gave me a discounted price to upgrade to the SPOT X Bluetooth.
Now I have learned that Garmin just released a new hand held plotter, that also has Inreach capability. This sounds great but the device is expensive and I already have the SPOT X.
Anyway I am happy with SPOT X. For my use, some off shore racing, some off the grid travel and hiking, the SPOT X works very well.
Barry