In San Sebastián, Spain, Sushi Zero is best approached as a sushi-focused restaurant: specific enough to guide expectations before you book. The draw is fish quality, rice craft and a tightly paced counter experience; at a comparatively accessible price point, it should be judged as a smart choice when you want something considered without turning the night into a major splurge. It is most compelling for diners seeking precision, pacing and quiet focus, especially if the night calls for something more considered than a safe default.