Martin,
It is not berry flavored. There is something unique about it. When you taste one, you know it becuase it is not like anything else. It also has (I don't know how else to describe it) two or three layers of flavor, which do not all happen simultaneously, as well as a very full richness to the flavor. The IDEA is like a spiced cider, or some such thing. There is a base flavor (the cider), and then some additional flavors (the spices), which blend, but also maintain some distinctness at the same time. Maybe it would make sense to say that the flavor is three-dimensional.
Black Weeping, Cilentano and St. Jerome have some of this same compexity and layering.