I've solely completed the prologue campaign so far. First impressions are excellent. Firstly, my experience wasn't adversely affected by bugs at all, though I did witness some minor glitches. Performance is excellent, much to my surprise - at least as good as Shogun 2.

The units and combat both feel really good - skirmishers are worthy of inclusion, as are the siege weapons, but the fun really starts when your Hastati hit home. BOOM!

Really, it feels a lot like Shogun 2, but with a different setting, more focus on open battle, and nicer combat.

9.5/10.