Finally got around to trying the new Coke Blak this afternoon. I co-worker told me of a local "Quick-Mart" that sells it cold by the single bottle, so I shelled out the 2 bucks
I started drinking it right there in the convenience store, because the clerk asked me to tell him what it was like!
I thought it was OK. Not great, not bad at all, just OK. Very different. Very corn-syrupy (as opposed to sugary), with a bit of an odd caramel aftertaste...the aftertaste sort of reminded me of the extra-crispy, dark parts you find on BBQ ribs, or if you REALLY over-toast a marshmallow. Not an unpleasant flavor, but not something I'd expect from a soft drink (or from a "hard" drink, for that matter!).
I'd buy the stuff again if it were significantly cheaper. It also occurred to me that it might work really well as an ingredient in a marinade for brisket (or possibly beef ribs, or venison).
My 2 cents!