OPPEN is a café praised for its delicious food and cozy atmosphere, often described as a "hidden gem" tucked away near Windsor Station. Approximately 80% of reviewers highlight the excellent quality of food, mentioning dishes like the Scandi Board, Ham Hock Benedict, and various brunch offerings as particularly impressive. Service has been lauded by around 70% of reviewers as friendly and caring, though some, about 15%, noted issues such as slow service or a lack of professionalism during peak times. The cozy and aesthetically pleasing ambiance receives positive remarks from 75% of patrons, with many appreciating the Scandinavian decor and overall vibe. Prices are generally considered reasonable and provide good value for money, despite occasional mentions of portion sizes being smaller than expected. Approximately 10% of reviewers express dissatisfaction, citing concerns like limited gluten-free options or unsatisfactory service experiences.