"The rear visual is lacking apart from the last few feet, so you can't detect a dive bomber till it's too late." Apart from those few feet you are completely blind to what's going on behind you. And the lookback button is not a substitute for a mirror. By looking back you lose all information regarding the front of you. This isn't critical for determining distance on say a straight before a turn, but in the heat of battle with cars all around you, clicking the lookback button is a terrible thing to use and handicaps you from making fast decisions and avoiding contact. I'm constantly avoiding dive bombers because I use mirrors and can see them coming from car lengths back, something you cannot do with chase cam. With front view, I can't see the nose...... but neither can chase cam or bumper cam, or even real life. Hood cam would be the only one. The biggest difference between bumper and cockpit in terms of judging distance, is that bumper cam lacks a visual reference point. Hood and cockpit are the only ones that give a visual reference point to judge distance to the car ahead. Bumper get's a invisible wall that you have to guesstimate, and chase has no front visual relative to the rest. So in actuality they are very different due to having a visual reference point.