As a former marriage blogger, I've read a lot of Christian marriage books. A LOT. Reading the tagline - "Marriage in light of eternity" - gave me hope that this one would be good. And while it certainly isn't awful and the Chans make some great points, it simply isn't a 4 or 5 star marriage book compared to the great ones that are currently on the shelves. It doesn't even come close to Keller's The Meaning of Marriage or Tripp's What Did You Expect? or Tim Kimmel's Grace Filled Marriage.
What I do appreciate is 1) the gospel focus, 2) the call to put marriage in perspective and realize that it has eternal purposes and 3) the emphasis on humility (modeled after Christ) being a cornerstone of a godly marriage. Many other marriage books neglect these core concepts.
That being said, I felt like the Chans were sidetracked by their oft-repeated criticism of American Christians; the chapters often veered away from the topic of marriage to once again call out Christian laziness. Furthermore, I felt like they even wavered on their opening strong point that we focus too much on marriage instead of putting God first; in the section immediately following this argument (written by Lisa), they then argue that the stakes are too high for us to ignore our marriage. Well, which is it? And the last chapter on parenting was so out of place; if you want to write about how to be a godly parent, a marriage book is not the place for it. It was in this section that I also felt they missed an opportunity to honestly grapple with the tension between following God's call on our lives without idolizing family but yet not ignoring the biblical call to disciple our own children. Francis directly states that it's more important for him to be traveling and speaking than coming to every ball game but when children resent their parents for involving themselves in ministry, it isn't because of missing an event, it's because those ministry parents missed them as people, people who also need Jesus! Not once was the very real problem of fathers neglecting the discipleship of their own kids in favor of ministry addressed. Despite the dismissal of this situation, it is a real problem with those who haven't learned to biblically hold the two callings in tension.
All in all, it isn't horrible or unbiblical. It just isn't good compared to what's out there. I suspect that anyone who loves Francis Chan will find this book to be amazing, but for me, it fell flat.