I would still be driving my 2011 if it had not met its demise. There is no comparison between the 2011 battery and 2015 battery in my climate. The 2011 was down to 8 capacity bars after a little over 2 years while the 2015 is still at 11 bars after almost 27 months and over 39,000 miles. The 2011 had some features I miss, but the heat pump, faster charger, and much better battery in the 2015 more than make up for the loss. I have no desire for the complexity, extra weight, and energy use of a battery refrigeration system and liquid cooling without refrigeration would have little or no benefit in 120 F ambient temperatures.