According to Elrington Ball, he was noted for learning and eloquence; in contrast to his son and grandson, who were both notably hot-tempered, he was invariably calm and self-controlled. His speeches were invariably well-reasoned, though critics complained that his delivery of them was stiff and monotonous.
Daniel O'Connell, then a rising young barrister, who thought poorly of Irish judges in general, complained of Smith's inefficiency, yet praised him as "a gentleman and a scholar, polite, patient and attentive". While his first marriage to a Roman Catholic suggests that he was personally tolerant of the practice of Catholicism, and he was in favour of Catholic Emancipation, one of his best-known judgments,
Butler v. Moore, held that a
priest has no legal privilege to withhold evidence of what was said under the
seal of the confessional. This decision was overruled in the twentieth century. ==Arms==