XI Advantages over other Middleware Tools ?

Ans) Pre-Delivered integration content
(Def: -SAP solutions bring their integration Meta data like CRM, SRM, SCM, xRPM, etc.) As delivered with the integration repository of XI.
Benefit: -
A) Out-of-the-box of integration solution.
B) Simplified upgrade of SAP solutions.
C) Versioning and modification management of integration of Meta data.
Openness and interoperability.
(Def: -Connect to existing integration solutions) like
Through JMS messaging (e.g MQ series) and SOAP.
Use open, XML standards for integration.
Incorporate existing functionality in to new process.