Restaurante Quinquéc is described as a cozy and traditional venue that serves Spanish cuisine with a focus on high-quality ingredients and well-executed traditional recipes. About 85% of reviewers appreciate the food, using terms like "exquisite," "amazing," and "spectacular," with croquetas and arroz con pitu frequently highlighted as standout dishes. Service is generally described as attentive and professional by roughly 70% of reviewers, although a few note issues such as reservation mishaps or less warm interactions, particularly towards non-Spanish patrons. Ambiance receives mixed feedback; around 60% find it charming and peaceful, but some criticize the small space for feeling overcrowded or uncomfortable. Pricing is mostly seen as reasonable, with about 75% of diners feeling the experience offers good value, despite a few references to high wine prices.