Isn't it great. You can call up for directions. You can get your door unlocked. You can call for help. Guess what else? A few years back I was in a truck with a buddy playing with the thing and I aksed the nice lady if they at (On Star) could listen to anyone in a vehicle without the operator knowing or turning on the system. She said yes. I dont know but wonder if it is still like that today. I dont own a vehicle with that so I couldn't tell ya. I am sure someone here does. Will someone please check and report back? aw thanks. See i think this is great. If by chance your choaking on some fast food you can tap on the dashboard in moris code and the nice lady's at on star will know to send help.