We've previously spent some quality drive time with two other Viofo dash cams, the A139 3CH triple channel dash cam and the A139 Pro two-channel affair. Both are good systems, with the inevitable devil in the detail as to which might suit you better.

Now, Viofo has an uprated two-cam system in the A229 Duo, with front and rear-facing cameras. For most private users, this is the dash cam sweet spot, covering as it does the road and all those other idiots on it both ahead of and behind your vehicle. Front and interior cam systems are ideal for professionals – e.g. taxi drivers and chauffeurs who might need to prove who did what to whom inside their vehicle – but for the rest of us, front and rear view is the optimal way to go.

The A229 Duo also bucks a recent trend in dash cams by including a large full-colour 2.4in HD LCD screen with a 140°-wide viewing angle. This displays either a full-screen live feed of the front cam or a picture-in-picture feed...