Jeff Atwood also has one - his review is here: http://www.codinghorror.com/blog/2012/09/the-last-pc-laptop....
Ubuntu is running on it, has some quirks currently, but runs quite well, although I had to remove the splash from the UEFI boot options to have it boot from a USB stick. Without any special power saving options used (like having the dedicated graphics chip turned off) I get between 3 and 4 hours of battery. Once I have time I will try to tweak the Linux a bit to consume less energy, turn a few things off (keyboard backlight, bluetooth, lower screen brightness) , I should be able to get up to 7 hours of battery or so. On text-mode only I might even get more.
The screen is really bright and has nice colors.
Only thing I didn't like was the trackpad, so I'm mostly on keyboard.