This is not a replacement for a SPOT device. It's a backup. You might need to move around reportedly, point it very carefully to find a satellite, coverage isn't great, even minimal tree cover is a problem, etc. Plenty of cases where a SPOT device would be a life saver and where this would not.
I too would like to ditch mine. But I'd rather be alive in a real emergency than die because I broke my leg and can't walk around in a circle pointing the phone right.