Excellent. Two love stories for the price of one and expertly written. I loved both couples. This is only my first Lisa Kleypas, but I will be devouring all she's written.
I teared up several times. A very powerful difficult story. One that as an American I've never heard before, but should be more widely read and understood.
I really enjoyed it. If you are a statistics geek and love reading social science studies (I totally do), then you will get the most out of it. It also contains plenty of his humor which is great and adds breaks between the hard data.