Panenco, a Product as a Service studio, focuses on providing fast and frictionless UX to its customers, but faced challenges in handling user feedback and issues in a reactive manner. To mitigate this, they implemented Sentry, an error and performance monitoring solution, which allowed them to quickly identify broken code, crashes, and failed API calls before users were impacted, speeding up investigations and resolving performance issues before they caused "user misery". With visibility into backend performance and the ability to detect endpoints with high response times, developers could cut the time it took to find and improve application performance. The team also integrated performance monitoring with their CICD setup, creating a stress-testing pipeline that generates reports on completion, allowing them to review response times and minimize manual overhead. As a result, Panenco saw up to a 90% reduction in API request execution time for its highest-volume portfolio products, demonstrating the impact of Sentry on their "frictionless user experience" goal.