After getting a Bradley kimura, I soon realized there was no way I can flip as well as the experts. So now, it's been relegated to toy/novelty status, although I am convinced they can be practical knives for utility work because fundamentally, they are knives. It's unfortunate that they have such a stigma attached to them as well as legal restrictions.
One thing I don't understand is why people say it's a strong design. I've seen too many Batangas balisongs that were loose as heck because of worn out latches and pivot pins. They probably wear out faster and there are better lock designs out there. One good point is that they are a design that doesn't really require coils or springs, making it easy to manufacture in less industrialized settings.