The JW Marriott Shanghai at Tomorrow Square is highly praised by guests for its amazing location in the heart of the city, making it easy to explore and travel to different parts of the city. The breakfast buffet is also positively reviewed with a wide selection of choices and great service. The rooms are described as clean, comfortable and convenient with stunning views of the city. The staff is friendly, professional and incredibly supportive, providing a top-notch experience for guests. While there may have been occasional issues with lost items and limited breakfast ingredients, overall, the hotel is highly recommended for its excellent service, good rooms, nice bathrooms and cleanliness.