On probably my 5th listen now. Even as a massive, massive Radiohead fan I was still a bit 'wtf?' at first, but I'm truly loving it now. It's reminding me a lot of The Eraser, Amnesiac b-sides and In Rainbows (a bit). It's not what I was expecting from them anyway! If anybody's not keen on it first time round, you'll appreciate it much more on a second listen!
Little By Little is awesome, but I think Separator is my favourite at the moment. It's so damn pretty!