Warbanners becomes quickly unplayable. It's not pretty to look at or listen to, the story isn't all that engaging, and the interesting tactical elements are hard to find under all the tedium. I would say that only a die-hard of the genre would appreciate it, but then, a die-hard would be turned off by the design flaws. It looks like we'll have to wait a little longer for the next turn-based masterpiece.
Despite the names of real historical figures and the armies of real nations, this is not a "historically accurate" game. It's a badass strategy simulator, one with deep gameplay and that glorifies what is maybe one of the most gnarly periods of human history.
It is certainly a pretty game. The minimalist polygon planes are very evocative, the sound design is lovely, and the abundant bloom lighting creates a mood. There's sort of a goal (get to the next triangle) and when you achieve it, the art style shifts. But I didn't really find it relaxing, I found it boring. And I never got over feeling perplexed.