GPS tracking with online monitoring. one that does autogeofencing is a better way to go. proper install of the thing is a MUST! no point tossing it under a dash and expecting it to stay there when the car gets broekn into. most joy riders know to look there.
richie,
I wouldn't mind trying to 'steal' yours at some point. I know most of them I can get past fairly quickly if they are poorly installed.