dont know much about this but the price is right. of course you have to already have a smart phone to use it, but looks like a good set up. your cell phone now becomes part of your emergency gear, so that kinda changes things. i soppose in remote area travel your phone should be treated as such anyhow.
http://www.findmespot.com/en/index.php?cid=116
-custom txt messages and emails to predefined recipients
-cheaper then the spot with gps package