Cheaper cameras dont tend to have GPS and that does add significant functionality, and whilst the Blackvues are expensive they are one of the most discreet options, have excellent software and come with features like auto parking mode, shock sensors, gps and connectivity options which allow immediate download to a mobile device/upload to the cloud so they are good value for money
However as I said earlier if all you need is a basic dashcam then the G1W is hard to beat