One Day one day?

So... everyone (including my bro) seems to be reading One Day by David Nicholls - but the 3-for-2 tables and newspaper musings don't give me the views I rely upon. I'm throwing this open to my ready-made decision-makers. One Day... thoughts? (I'm setting aside the fact that I totally had the idea for this sort of book years ago... except mine was going to cover eighty years... yeah, probably why that didn't get written.)