I don't get the big deal about AC in the cars, these are basically grown up Von Roll Sky Ride 101 cars (the sky bucket was Von Roll 101, but almost every other theme/amusement park had one back in the 70's), Doppelmayr IS Von Roll. I have ridden dozens of them... there is enough breeze in the air even in the hottest climate to make for a comfortable ride. Also, there is a Von Roll at Stone Mountain in Atlanta Georgia, in fact, it's probably a more comparable experience. The Von Roll at Stone Mountain is a large, glassed enclosed car, that holds probably 30-40 total people. No AC, IN ATLANTA. I rode it in August... no problems. Think about it, are the EPCOT/Hollywood studios boats air conditioned? No. If there is moving air, and shade, you are usually comfortable.
By the way, as someone who goes out of their way to ride Von Rolls whenever I can... I am THRILLED about this. I have yet to stay at CBR (its the last moderate I haven't stayed at...) and I think this might be the driving perk to finally get me there.
Jennifer