My 23 year old son runs his own small company, and he just traveled to South Korea and Vietnam to do some business. I sent him with the model 54 tracker, set to a low update rate, to keep with him. It worked perfectly. A simple story, not flashy. My most precious asset, tracked perfectly. I always tell him, "Son, lots of things are out of our control, lots of things can go wrong. If something goes wrong for you, you want me to be the first person to know your last known location....". It's as simple as that.