I really enjoyed this book.
Oddly enough. I think I would have enjoyed it more had I heard less about the premise before picking it up. Realistically, I would have ready it for the author's name alone and I think that I might have liked puzzling out the premise on my own and being surprised by what she was doing.
Because this is still something of a mystery book, not in the whodunit sense, but in the "what's going on?" sense and many of the reviews felt the need to explain the strange, speculative elements of it rather than allow it to be experienced. And Atkinson sets it up so well, its almost a shame to know what she is doing the first time around.
Having said all of that, this book was brilliant. All the characters were incredibly well done (part of why I love Atkinson) and she is just one of those writers whose ability to evoke scenes is unparalleled. And the story is, of course, great.

One of the trickiest moments in this book, and I'm still torn between whether it was amazing or deeply frustrating, was the way she dealt with the "Let's Kill Hitler" elements of the story, mostly by not making it about killing hitler. It was about getting things "right", making everything or everyone "okay". Sometimes more, sometimes less. And I think I love it, and Atkinson, more for leaving me so conflicted.