Now that the film's on general release in the UK, here are my thoughts upon first viewing, a couple of months ago (warning: contains spoilers). I scribbled those down in a hurry before the first impressions faded, then buried it under lock'n'key until now. It's actually quite interesting going back to see what I wrote.
I'll try to write something else soon, now that I've had time to digest a little more (and re-watch it. :-).