Signature Koi offers a diverse range of innovative drinks, including alcoholic options and specialty teas, in a spacious and vibrant atmosphere. While some patrons appreciate the unique flavors and ambiance, inconsistent service experiences and high prices have led to dissatisfaction among others. Attitudes of staff vary, with some customers reporting rude interactions and poor service. The menu has expanded beyond traditional bubble tea, featuring desserts and desserts, but issues such as limited seating comfort and inconsistency in product quality remain. Overall, it is seen as a trendy spot with potential, yet marred by service and price concerns.