[Serenacula]

I actually think I disagree with this. Yes it'd be incorrect some of the time, but that is also true of humans. Provided it gets it right most of the time and is reasonably fluent, I don't think that minor errors would matter much.

This seems much more a tool for practicing the stuff you learn in another context to me, rather than a way of learning in itself. You can use it without the social pressure of stumbling slowly through sentences with another person.