I did not load it into the kayfun. I just tried a little in the dripper. It DOES taste like coffee for sure. It is not knock your head off strong, but you won't be saying I can't taste it either. I like my coffee with sugar, and cream. I tasted maybe a little sweetness, and no cream. I can't place that taste, but I have had coffee just like it. Maybe Starbucks? It has been a long time since I've had a coffee from there. I'd say it is medium to somewhat strong. But it is not Louisiana coffee strong. I am not sure what dark roast tastes like, so I can't help you there. I really wish they would put better descriptions on juices. Just get a small bottle next time. Just because I like it, doesn't mean that you will. I don't like super strong coffee. If it is that way, I add a ton of sugar and cream to it.
Try blending a little Tusacan Cocoa or Temptation or Heavenly Army or Shadow in with that coffee.