Casa Dani, situated within Mercado de la Paz, is consistently recognized for its exceptional Spanish cuisine, particularly its famous tortilla de patatas. This establishment attracts both locals and tourists seeking authentic flavors in a lively market setting. The Spanish tortilla is overwhelmingly praised by approximately 95% of reviewers, frequently described as "the best," "unreal," "perfectly soft, juicy, and creamy." Many recommend versions with caramelized onions. Portions are noted as generous, with a half-portion often suitable for two people, and prices are considered reasonable. Beyond the tortilla, other highly-rated dishes include the cod, described as well-seasoned and tender, and the gambas al ajillo, noted for being sizzling and garlicky. The Txuletón steak, huevos rotos, and tarta de queso also receive significant positive mentions. However, about 15% of reviews suggest some other dishes are "average" compared to the standout tortilla. Service is generally perceived as friendly and helpful by about 70% of patrons, with staff often accommodating by providing English-speaking assistance. Conversely, around 20% of feedback indicates inconsistencies, including rushed staff during busy periods, difficulties getting attention, and occasional order mix-ups. The ambiance is characterized as vibrant, busy, and "no-frills," reflecting its market location. Queues are a frequent occurrence, noted by 60% of patrons, often leading to wait times up to 45 minutes, particularly during peak hours.