@Padwanjoe - As requested, please find below a link to some video footage of my Mobius B in its new rear facing installation.
It's quite large (235MB) & I'm trying mega.co.nz for the first time, so here's hoping this link works:-
https://mega.co.nz/#!E5gnxTZT!eJ2K2-FBUXWArZBh0v-IsvYEL8pZjRBbvJbSaye5ie0
It's been taken through the dark tinted rear window of my car using a Mobius B (wide angle lens) ActionCam using the following settings:-
FW 1.20
1080P Narrow FOV 30fps
Movie Quality - Super
WDR - On
White Balance - Auto
Colour Effect - Standard
Exposure - 0
Contrast - 0
Saturation - 0
Sharpness - 0
BTW I'm still experimenting with the Exposure Value (EV) settings at the moment to find the best 'all-round' setting for it's new use. I suspect that I may have to set EV to +1 and sacrifice some clarity on sunny days, in order to get better video footage on overcast/rainy days (as we get plenty of those in Wales!).
At the moment EV +1 tends to provide a slightly overexposed image but, hopefully, this will be improved in a future FW release.
Anyhow, I hope video this gives you a good idea of it's potential as a rear facing DVR.