Mio MiVue 388

Continuous, automatic video recording of your journey ; GPS-tagged recordings that you can view alongside a map ; G-sensor information included with location and video

Primarily useful if you are worried about accidents ; Your car power output can't be used by a sat-nav at the same time ; Relatively pricey for a single-purpose device

The MiVues contain G-sensors, too, so they will trigger a special recording when they detect an impact or when you take a corner too quickly. You can also press one of the buttons on the device to earmark a recording as an emergency clip rather than...

Good quality video, motion detection, gives plenty of information, speed camera alerts

Battery life is very short, design can make mounting restrictive

Dashcams may come in useful for those who want to provide evidence when an accident involving their vehicle takes place, or those who just feel they miss out on being able to capture interesting things that happen when they are on the road.