This theory tremendously helpful to understand the couples’ relationship history. It helps to see how the couples transit from one stage to another and whether they made the transition successfully. If not, it helps me and the couple to evaluate how have they tried to cope with the issues successfully or destructively. Even in the “complicated situation” such as divorce or blended family, the theory also helps me and the couple to see what are the needs for them to cope with being different stages in their relationship.