Not well. I was in Quebec City last October through December doing a flight test program. An 18" LCD display and one of the computers we used in the plane were consumer grade. Neither wanted to work in the morning after the plane sat outside in below freezing temps. The LCD was too dim to read and the hard drive in the PC didn't want to spin up. We had to get a heater to heat them up to the low end of their environmental range as part of our preflight.