Reviews depict a diverse experience with Mr Onigiri, highlighting consistently tasty and generously filled onigiri that evoke Okinawan flavors, paired with friendly service and good value. However, concerns about long wait times, limited seating, inconsistent food quality, and service issues are also prevalent. The shop is appreciated as a convenient, quick-serve spot for fans of Japanese-style rice sandwiches, especially for takeaways and casual dining, but some find the prices high for the standard ingredients used. Overall, it remains a popular choice for a satisfying snack, albeit with room for improvements in service efficiency and food seasoning.