Yes, MS Store. Have been playing all day. I can't understand any negative comments about this. It's so fast, the screen is amazing and it plays with all my old hardware without a hitch. And the battery has been lasting fine - on lowish (but perfectly fine) brightness working in Office it was offering six hours on battery. I have also tried it with an external DVD drive and it had surprisingly little impact on battery.
Only single surprise - it does get a bit warmer than I expected on the back, but that's no real issue.
Import fees worked out at approx. £130 in the end. Still think the total will work out cheaper than when it becomes available in the UK. But best of all I have it in time for my business trip on Saturday. Perfect timing (and Bundlebox really are superb).