Mine has arrived.
Absolutely love it. Incredibly small and light - a tiny bit thicker and heavier than my Nexus 10, but not by much - especially considering the power it has available. The whole thing is incredibly well put together - very solid, almost entirely metal and glass, and just generally a pleasure to hold. The screen is incredible. Really bright (almost uncomfortable at the brightest setting), bright and vivid colours, and the sharpness is fantastic. Makes my (really very good) 1080p Dell screen look like a sack of shit. The power is fantastic too - I can play CS:GO quite comfortably on mine, and it munches through some complex data processing stuff not much slower than my 2500k equipped desktop.
The main negative is that the experience isn't quite polished enough yet. The first 6 hours were marred by updates, reboots, and long periods of staring at a progress bar moving up by 1% every five minutes before Windows would boot. Windows proper isn't that touch friendly (especially if you turn the display scaling down to make things smaller), and the popup keyboard isn't as good as it's Android equivalent. However, being able to run full Windows apps on what it is entirely fair to call a tablet is remarkable.