I've been using the Zona rear-view system (£239) for 1500 miles and here's what I think so far.
What’s good? If you are fed up with mirrors that show elbows and not much else, this could be for you. It arrived neatly packaged up in a box containing everything you need. It’s very self-explanatory and easy to fit. The camera bracket locates neatly behind the numberplate, the camera itself is hard-wired into the battery. It is switched on purely by moving the bike and pairs up automatically with the headset, which is easily installed into any crash helmet.
Adhesive pads attach the receiver to the rear of the helmet and the flexible display arm fits in behind the lining. Now on the bike with the helmet on and the display just below my left eye (it can also be fitted on the right) and angled so I can see the whole screen clearly. It seems a little odd at first, when I glanced down and see the road and cars streaming away from me but I soon got used to it.
Compared to using conventional mirrors the cars behind appear a little closer, but the big advantage is the fact it is a continuous view from left to right with no blindspots. After using it for a few weeks it becomes second nature and not an added distraction. Any footage filmed by the camera is recorded in a long loop onto a USB dongle, in case you need to look back if there has been any kind of incident.
What’s not? It is a lot of money compared to a pair of mirrors, but it does eliminate any blind spots you would normally get.