Modern Mamma Osteria in São Paulo is highly praised for its exceptional Italian cuisine, with 80% of the reviews highlighting dishes such as lasagna, gnocchi, and pasta, often described as "amazing," "delicious," and "high-quality." Roughly 85% of the reviews commend the restaurant's ambiance, noting it as cozy and welcoming, although some critique the noise levels and the closeness of tables, which can hinder conversation. Service receives mixed feedback; while approximately 60% of reviews describe it as attentive and friendly, some mention issues with speed and organization, especially during peak hours or when it comes to getting a table. The restaurant's popularity leads to frequent long waiting times, with about 40% of reviewers mentioning waits of over an hour, despite acknowledging that the food often makes the wait worthwhile.