Okay: boy breaks up with girl during the worst day of said girl's (apparently not very eventful) life. Universe gives her a week's worth of do-overs so that she can (she thinks) convince the boy not to break up with her. (In reality, of course, she's meant to learn that he's not The One.)

But here's what I don't get about this kind of book: if the universe was going to hand out do-overs (and not just a single do-over, mind, but do-over after do-over), wouldn't you think the universe would have higher priorities than, like, how a girl feels about her breakup? I don't mind Ellison as a character, but she's not especially interesting, and for all that she's meant to be intelligent and well-rounded and all that, her only concern for most of the book is who she is or isn't dating. It's fun enough, but very well trod already.