"Good but hard to apply"
John Gottman explains his research very well and it is very interesting research, very useful information. However, I found that applying his ideas were difficult presented from an oral format. For one thing, some of the ideas were still too conceptual to apply. For another, his application ideas struck me as long and time consuming and requiring planning - first do this, it may take you weeks or months to get it right, then move on to step B, etc. Listening to his book a couple times can be very insightful for information to understand your relationship. In fact, you may find it an essential foundation to build on, but if you want to improve your relationship, you may find other approaches easier to put into action.