DAC311:
It's actually funny that you mention that... I recently received a bottle of RY4 that I thought was bad when I first opened it too. My only prior experience with RY4 was in a pre-filled from a sampler pack, and I loved it there. My initial thought with the bottle was that something was wrong because it just tasted kind of funky.
I have continued to vape it, because it's the only 6mg I have, and I thought that maybe it was just I remembered the flavor badly, but now that somebody else has the same complaint, I think that perhaps it was a bad bottle. Is SI taking care of this? I think my bottle is "off" too...