I'd just like to report that I'm running the latest Beta firmware, (downloaded from the links here) and I'm using the three wire kit supplied by the Australian Viofo distributor.
Just as a note, it has a straight plug.
Everything works as advertised with the camera dropping into 5fps parking mode once I pull up. I haven't bothered to analyse the transition times.
I've got a Samsung 256 gig card inserted and decided to look to see how much footage is being captured in a regular week routine. Much to my surprise, I have three days captured as of course, the car spends most of the time in parking mode.
The timelapse of the carpark behind me at the National Park yesterday did make for amusing viewing.
To whomever it was that pointed out about the CPL filter being useful for looking through the windscreen reflection of the car behind, you are dead on the money.