Just got one of these for Christmas, and think its a great deal. No its not a GPS, Yes it is an emergancy locating device that can be used in a non emergancy way to track where you have been and where you are to some one who is sitting at home wondering. They can not contact you by cell phone because your out of reach etc.
I had just this type of situation this last hunting season, where I was out of cell phone range all day in Montana's south fork area. I had 7 text messages when we finally got out at the end of the day. I told my wife, it I didn't answer the first one, what made you think I was going to answer the next 6.
IF my hunting partner, or I would have gotten hurt some 50 miles back in the south fork area, it could have ment life or death if one of us were down, while the other had to go back for help.
That was the selling point of the SPOT for us.