Stan's Robot Shop is a polyglot microservice application designed as a sandbox for learning container orchestration and monitoring. The system comprises eight services (user, catalogue, cart, payment, shipping, ratings, dispatch, web) each built with a different technology stack (Node.js, Java, Python, Go, PHP) and communicating via HTTP or RabbitMQ. Data is persisted in MongoDB (catalogue, user), Redis (cart, session), and MySQL (shipping, ratings). The application provides Docker Compose and Kubernetes manifests for deployment, along with Instana integration for automatic tracing and metrics collection. While the application successfully demonstrates microservice patterns and technology diversity, the codebase exhibits significant technical drift due to outdated dependencies (e.g., Express 4.15, Redis 2.8, Spring Boot 2.3) and lacks modern practices such as comprehensive error handling and security measures. The architecture is modular and service boundaries are clear, but the implementation relies on boilerplate for tracing and health checks. A notable reusable component is the Haversine distance calculator in the shipping service, which is isolated and dependency-free.