It is good stuff, I'm going through the book right now.
These guys were very thorough in this book, not only do they give you a Godly model to follow but they go into detail on how to do so.
It's different from any marriage book I've ever read in that they're not telling you if you do X your spouse will do Y. Instead they are saying if you do X you will thrive despite whether your spouse does Y or not...and maybe what you think Y is isn't really good for your marriage anyway.
I recommend it to anyone struggling in their marriage. It's pretty powerful stuff...God's reaching out through these guys & their book straight to my aching heart.
Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground...