Hamburguer do Seu Oswaldo is celebrated for its delicious, traditional burgers, with nearly 85% of reviews offering high praise. The simplicity, consistent flavors, and the nostalgia evoked by the vintage setup, as mentioned by approximately 80% of reviewers, contribute to the venue's charm. Many highlight the authenticity, with several reviews appreciating the unchanged recipes and long-tenured staff; representative phrases include "travel back in time" and "same flavor." While the majority adore the old school atmosphere, about 10% of the reviews contain criticism, mainly focusing on the lack of modernization and limited menu options. Concerns are raised by around 5% of reviews relating to the overrated perception and pricing versus quality, as some find better alternatives nearby. Payments are cash-only, a detail noted by some visitors, emphasizing the need to be prepared with currency.