Though I love the SP1->SP2 upgrade, my one gripe is that they didn't go with a fan-less design like other Haswell laptops. On the SP1, I could see why they needed the fans at least for driving an external display via USB. That's the only time mine used to come on, and I run some fairly thirsty statistical processing programs. I have yet to hear the fans come on with the SP2, even though I use the identical setup. Has anyone heard the fans come on yet? Methinks they could have done without the fans, and thus either improved battery life further or reduced thickness + weight. Sadly I failed to ask their hardware designer this question at the Boston Surface 2 launch, but I figured they were still necessary as with SP2. Not so sure anymore. Here's hoping SP3 will be fan-less!