It is pretty cool too, you have to learn how to use it a bit, but once you do it is one of those things you can learn to like a lot. :-)

For example, on the HCH, the bigger the difference between the temperature you set and the cabin temperature, the higher the fan speed will be, and it will gradually slow down as the temperature is reached (if you run the fan speed in AUTO).

I once had the air on, with the thermostat set for 70, and hit a prolonged patch of trees. The fan speed dropped significantly, and I assume the compressor cut out also, I didn't experience the usual frigid effect from sudden shade with the air on.

The first time it happened I was really impressed. :-)