This was an extremely insightful read leading up to (ironically) my divorce. It helped me to more clearly identify what was going wrong in my marriage and what it would take to fix it. His descriptions of the different ways couples argue were especially helpful. He provides relationship strengthening exercises that can be done individually or as a couple. One exercise in particular provided a lot of clarity because my immediate thought on reading it was, "This seems like a really good idea, but the emotional toll it would take on me given the state of our relationship isn't a cost I'm willing to bear." That sober look at the costs necessary to repair my marriage allowed me to clearly see the pros and cons of staying in the relationship. Although we ultimately divorced, I continue to use the insight I gained from this book in evaluating the health and long-term viability of my dating relationships.