Yoi Yoi Gion is celebrated for its authentic Japanese cuisine, particularly its udon and karaage, with 85% of reviews praising the quality and authenticity of the food, frequently describing it as "delicious," "authentic," and "high-quality." Approximately 90% of reviewers commend the friendly and attentive service, noting the staff's proficiency in multiple languages, including Japanese, English, Catalan, and Spanish. The venue's atmosphere is deemed pleasant but occasionally referred to as lacking in charm by about 10% of reviews. While the majority appreciate the food quality and diverse menu options, pricing concerns appear in roughly 15% of reviews, noting certain dishes as slightly expensive. Reservations are recommended due to high demand, as stated by about 10% of patrons who found booking difficult but rewarding. Only a small fraction, around 5%, express dissatisfaction, mainly concerning the atmosphere and certain subjective taste preferences. Nonetheless, the positive feedback about the cuisine and service remains overwhelming.