It is definitely a good book for couples and it has improved my relationship with my wife. If nothing else it shows you what things your partner is really looking for out of their spouse. I quickly found that my love language was "Acts of Service". Though it might not be sexy or macho to say that, it means more to me to have the dishes and laundry done when I come home after work or have minor home improvements taken care of before I get home. My wife and I have 2 small children and our house is hard to stay clean because every room feels like a mess. We do clean it all the time but it feels like a losing battle. My wife's love language is "Words of Affirmation". As you can tell from all these Amazon reviews I am much more of a writer than I am a talker. My wife is always looking for me to say how much I love and appreciate her because I don't say it often enough.
A big part of improving your relationship with your spouse or boyfriend/girlfriend is to sticking with a date night to make sure you have quality time together. Especially if you have children or a high stress occupation. My wife and I have been together for 10 years and got stuck in the rut of an endless routine of doing everything we could for our kids, followed by daily chores and left little time for ourselves. Committing to 1 date night a week has really helped our relationship and improved our communication.
I recommend the book for sure and found it inspiring and worth reading. All couples can benefit from reading this book. The only downside is I wish it could have been a little longer. The stories from the author are interesting and I would have liked to have heard a bunch of his other examples of couples that he has dealt with. It was a short book and my wife and I finished it in 4 or 5 days and that was reading it slowly. The price is easily affordable. I found it best to photo copy the test quiz at the end instead of writing in the book so we can give the book to any family or friends who are struggling with their relationship.