I had a very bad experience with SPOT a few years ago, left a bad taste in my mouth. It showed me "message sent" confirmations of "I'm OK" for 8 days in a row when i was on a 350 KM long wilderness canoe trip on the Clearwater River northern SK-AB, but they were all false positives. My brother in law almost called search and rescue several times when the SPOT unit went silent at his end, but was talked out of it thank goodness. That would have been a couple hundred thousand in expenses I didn't want or need.
My Delorme In Reach has worked perfectly in Northern BC, Uzbekistan, and Northern Sask-Manitoba-and the S border of Nunavut. Saved a moose from spoiling on a fly in hunt just S of the Yukon, sent for the float plane a couple days early when the weather turned unseasonably warm. I like my Delorme.