Wandering out of cellular service with my partner and dog is one of the great joys of my life--A break from email and Twitter is good for the soul. Not being able to contact the outside world in the event of an emergency, however, sucks. The SPOT Gen3 GPS beacon was designed to address this problem. It allows for the sending of check-in messages, location data and pleas for emergency help to the outside world via a satellite connection (expensive subscription required.)
For my thoughts on the device, you can read my full review here.