So, I worked for a company that was sponsored by "Black Cherry Vanilla Coca-Cola." It was awful. God awful. Pretty much everyone who tasted it (and this was in Atlanta, I dunno if it ever got a nation-wide release), concurred that it was "not enough cherry, not enough vanilla." Pretty much imagine combining half a cherry coke and half a vanilla coke, and that's what you were drinking.
Sadly, as sponsoring partners, we had cases upon cases of this stuff at the office, and since we were cheap, we drank it... a lot.