Just to add my two cents, a camera is a useful tool to have to check before you begin backing up to make sure there is nothing behind you that might otherwise go unseen, but while actually backing up you should be turning and looking while driving. Again just my beliefs on the matter.
From the AVIC thread, not of anything special:
Screen image MAY appear reversed??? Does it decide to reverse the scene sometimes and then not to at others? Someone needs to redesign their on-screen messages.