Reporting is pretty good. Its interface is also good. I'm overall pretty happy with the functionality and use of IBM Rational Test Workbench. 

To me as we have used most of the MQ stub," MQ recording" is the best useful feature i would say -because of its flexibility to configure various MQ recording methods as per the implementation and "pass through"feature too.

All IBM testing tools are really well integrated. They are good at integration and provide valuable collaboration with other tools. If you have the Workbench then it can be integrated and collaborated with other IBM Rational Tools.

This solution provides for API testing, functional UI testing, performance testing, and service virtualization.

Rational Test Workbench Eclipse client has the ability to do the test scripts for recording, playback and customization inter-working with Android simulators and iOS simulators.