I think that the nice thing about BDD is that it reduces the gap between requirement gathering tools (use cases/scenarios, to be specific) and user acceptance or integration testing.

But it doesn't banish the problems of inconsistent or incomplete requirements. And it doesn't drive away solution complexity exlosion as you descend into the code. And it certainly isn't as useful for diagnostic debugging on changes to the code.

But it's in the user's language (-ish), so it's more likely to be funded and supported. That can only be a good thing.