I took delivery of my RT1 3 weeks ago, and I live in Park City, UT. It has been a single-digit temperature since then, and has been a brutal start for my new RT1 since it has been outside the whole time. I have to say the heating of the cabin and seats doesn't take so many miles of the range. Super cold battery seems not so good for charging and driving, it takes a lot longer time to charge. One day I drove to Snow basin (118 miles round trip) single digit temperature, using all heating in the cabin seats, steering wheel etc, and drove at 75-80 mph. I only lost 22 miles from the computer-calculated distance before the start of the trip, working the truck hard.