The core is very stable.
OpenESB offers a stable core with features that promote clear service boundaries and interfaces, supporting both top-down and bottom-up approaches for service definition and composition. Its robust process-oriented capabilities allow seamless BPMN to BPEL tracking and effective choreography and orchestration. However, documentation needs improvement, with resources being scattered; users are advised to seek community support for guidance. Its cloud deployment capabilities also require significant enhancement to better meet organizational needs.