I purchased my 2007 Cadillac Escalade in March '06 when it was first released and have put about 10,000 miles on it. It's been flawless in every way and all the tech gadgets work the way they are supposed to. As far as climate control, I already suffered through a long heat wave with temps above 100 and the AC performed flawlessly. You can start the car remotely and by the time you get in it it will have already cooled down considerably. Once you get in and blast the AC and ventilated seats you will be pretty cold. Anyway, I look forward to your feedback as to how it actually performs in your area. Good luck.
Remote start, how the smart navigation system doesn't shut down completely when driving unlike Lexus, auto high beams, how the OnStar phone hooks up to a Verizon account to save money, the heated/ventilated seats, extremely adjustable driver's seat (I'm 5'3" and sit high in the saddle), and how people turn their heads when you go by!