Well, my question to you is why WOULD it be popular? It's a complex system that doesn't seem to offer any real advantages (the lock on it was demonstrated at 125#, IIRC, whereas other lock designs have supported FAR more. Balis have a mystique: banned many places, martial arts created using them, etc. I'd play with a baliyo in a restrictive place before I went for one of those.
Second, though they have another version, I can't understand a double edged blade without a fluting of the handle to keep you from sliding up. Those handles don't have any inlay either- just aluminum. Sounds way sketchy to me. Even flipping it sounds sketchy- Benchmade has offered holes in the handle that would serve to increase grip, or g-10. Lightly engraved surface? Uhh... not with my hand!
Never had one, but have no desire to. I was just answering why it doesn't seem popular. If you want it for a lark, why not? But I'd recommend some grip tape on the handle, some mods so you have a blade guard, etc.
Zero