We're in process of using the framework. We've completed a 133,000 AR
creation test in our testing environment without a single failure.
We're using nservicebus and sql server. So far, very impressed! During
those tests, we were running AR data validations on the add commands.
We had 3000 adds that should have failed before being sent to the AR.
The did and we handled them. We have denormalizers that created the
entries in our readmodel. None failed. I'd say that is a pretty good
testament to the framework and nservicebus.