I bought a Spot in January and tried it out in the Sanibel/Captiva area in February. I works great. It basically has three functions: --Check OK--Sends a signal to the satellite which in turn sends an email and/or a text message to up to 10 people you have programmed in on the website. The message includes your lat long. If you get the email, you can click on the lat long icon and it will pull up Google Maps and show your location. And it is very precise. When I tried it from home the first time, my buddy was able to tell that I was in the back yard as opposed to in front. --Tracking Mode--sends the same email/message as above every 10 minutes until deactivated. --911--Sends the same email/message as above with the message need immediate help. At this point, the company (a human being as I understand it) contacts the nearest emergency responder to your location (coast guard or land based rescue), gives them the message that you are in distress and at X location. Of course, I did not try this function as it is the same as a 911 call and can result in charges for false alarms. There was a thread on THaT other forum in which a CG air rescue pilot chimed in. He said the big difference with an epirb is that CG can directly tract a 406 epirb signal, whereas the spot gives only a location at a particular time. I'd say if those NFL guys had had a spot, it would have saved their lives.