I have one of these too. I can’t believe how long it’s performed at very high levels of use including two external screens and 10-15 memory intensive applications running concurrently, including three different browsers with multiple tabs open on each. I installed a new video editing application today and was apprehensive it would stumble, but it worked like a champ.

The battery indicator is starting to show a decrease in performance. It won’t hold a full charge, but even when I’m without a direct power connection, I can still have it running for nearly 4 hours with Wi-Fi, 6+ without.