Jim,
have given it a run, on the higher settings and found that with a couple of 2ltr bottles of water (frozen) in the fridge it runs at 30ah per day @ -4c.. I did however run it from a power supply not a battery.
I have done one trip back from Gladstone with frozen fish, in the fridge from the car battery, then kept the fish frozen in the Waeco for a week but again on the power supply.
I have had a couple of dramas with teh 12v plug popping out of of the cigarette lighter socket, it has a fuse, but not blown, I suspect it is just expansion and contraction / heat related. I have considered changing the plug myself, but have defferred the Idea for now as I want the unit to work from the car.
REgards
Honda.