I have not, but my concern would be becoming dependent on a third party Flash development tool for my workflow, and then being left behind as Adobe adds new fea

I have not, but my concern would be becoming dependent on a third party Flash development tool for my workflow, and then being left behind as Adobe adds new features to the runtime unsupported by the IDE I'm using, or worse, that they find a way to break content created with the competing IDE. I don't think such a possibility would be all that unexpected, given Adobe's competitive nature and refusal to cede control of the runtime.