First of all, the game looks really good. Some impressive stuff going on here.
The god of war comparison is inevitable, at least in combat, the fixed camera, the QTEs, the whip feels just like the chains of olympus. This obviously isn't a bad thing though, it feels good and that's all that matters.
I'd definitely get this day 1 if it didn't release so close to vanquish and GT5 though it might end up being better than vanquish, who knows? Anyway, there's no doubt that this is a winner.