I'm a recent TT user. 3 days ago I purchased a 730. Coming from the Garmin (Streepilot C550) and the Dash experience, I can say Tom Tom is the best I've had so far. I'm still learning the ins and outs of the unit. So, here goes a newbie question. At times, I've left the unit on the car with the power charger attached and connected, and have found out the unit turned on... by itself. Is this a bug? I'm really baffled caused I know, for a fact, that before leaving the car unattended, I have turned off the unit. Has anyone here have had this happen?