Hubby is on his way to Alaska and I just returned from MO. We both recently purchased SPOT for our trips. Assuming it works as it's supposed to, it is a comfort to have along in case of trouble. But it's also a source of comfort for friends and family to know that we've arrived and all is well.
My one issue is that it does take a while for the notifications to be sent out once you press the button. There were a few occasions that were followed by phone calls asking if I've arrived. Apparently I was not holding the button long enough or not allowing enough time for the sattellite to read.