C02 oil usually taste like feet IME. Just a funky taste to it. It seems much harder to make quality C02 oil than it is to make quality BHO, ISO, etc... It also requires much more investment, so unfortunately I think that is the reason for so few quality c02's being available. I had some amazing C02 oil at the Cannabis Cup in Denver from Evolabs/element 420. Tasted surprisingly great, but it took awhile for it to vape on the nail, like it would just sit there for a few seconds that go, plus the consistency/texture of the oil was so runny that it just didn't seem right. And that's the best c02 I have had. Plus in CA most BHO seems to be marketed as c02 extract because of legal reasons. This is of course just adding more confusion and misinformation.