I have one of those SPOT's that blinks when the message has been sent. As far as I know, the message has ALWAYS gotten through.
I have the "tracker" option but I don't always use it (didn't this year). It's more fun for those back home when you are moving locations frequently vs. base-camping. Oh, & I generally turn it "OFF" when I approach favorite fishing holes. Had a buddy back home once tell me he marked his maps where he saw me circling & circling. Yet another thing to keep in mind when using these devices!
We establish habits on the trail & back home when we use these communication devices. They set different expectations than in the yester-year of days-before-devices. About the best we can do, should we prefer to use them, is to soundly educate the folks back home re: their limitations.
Here's a case-in-point.
I did a trip with a next-door-neighbor kid a few years back. His mom was nervous since it was his first-time-ever camping. I did everything I could think of to put her mind at ease. I bought a fancy Katadyn water filter so she could be sure I wouldn't poison her kid. I promised to use my SPOT every day and I even instructed the kid how to use it, just in case I should become incapacitated.
All those plans nearly went for naught, however.
On Day #1 I was using SPOT's tracking feature & keeping it running so the folks back home could follow us. However, I was seeing only "red" lights (ie. no signal) when I kept the unit in my life vest pocket. Eventually, I took it out and placed it on the floor of the canoe in front of me. Bingo, green lights!
Then, I simply forgot about it.
A portage later and another couple miles of paddling, we arrived at camp. The first thing I aimed to do was to send the "OK" message. Oops, no SPOT Messenger!
Yup, when I flipped the canoe over my head back on that portage, out went the SPOT!
Of course, in my panic, I didn't think of that right away. Rather, I frantically checked all the packs I might have stuffed it in during the hustle-bustle of portaging. Hmmm... no luck, just more panic. The kid's mom would worry and give me hell when I got back. The kid's father was a lawyer (not sure why, but I was keenly cognizant of that fact, perhaps fearing something else might go wrong). Anyway, eventually I calmed down & thought it through. After a quick camp set-up, we hustled back to the portage, looked around, and eventually found my SPOT under 6 inches of water at the other end of the portage.
We got lucky. It worked just fine.
From that point forward, on every trip since, I've carefully explained the "limitations" of using these devices to all concerned back home.
Something similar has surely happened with Magic Paddler. I don't think many of us, including his wife, are really very worried.
Nevertheless, there's always that small sun spot of doubt.
Expectations....
Jimbo