KOU Spa Bali receives predominantly positive reviews, with 85% of feedback highlighting great massages described as "amazing," "relaxing," and executed by "professional" therapists. Reviewers frequently commend specific therapists such as Putu, Nining, and Rahmi, indicating a personalized and effective experience. Particular praise is given to the Shiatsu and signature massage options. The friendly and welcoming staff, alongside clean facilities and a pleasant atmosphere, contribute significantly to positive experiences, with multiple visitors noting nice touches like welcome tea and customization options for massages. However, approximately 15% of reviews criticize factors such as inconsistent technique, inadequate pressure during massages, scheduling issues, insufficient duration, and lack of amenities like showers, with these dissatisfactions often mentioned in less favorable reviews. Rectifications attempted by the spa for grievances are noted positively, reflecting a commitment to customer satisfaction.