Couples therapy can be a great way to help couples work through their issues and improve their relationship. However, it's important to remember that not all couples who go through this kind of counseling are successful in doing so. Studies have found that between 20-30% of couples who undergo couple's therapy report improvement in the quality of their relationship. This means that 70-80% either remain unchanged or deteriorate further during treatment. It is also important to note that different types of couple's therapy may vary widely in terms of success rates, depending on the techniques used and the particular goals set by each individual couple.