Just checked out the demo. It runs really well. Artistically it's great, I expect nothing less from SquareEnix. Technical graphics are nothing special though. I'm not saying it's a problem or anything just an observation.
The only problem I did see about the game is it felt convuluted. I'm used to SquareEnix games going through what I refer to as the "adaptation phase" where the game establishes the world, explains the situation, and takes your hand gradually through the beginnings just introducing you to its features one at a time. As a demo this was just too much to take in at once.
The combat system is ok, it's sort of a mix between traditional turn-based JRPG and tactics. It took me a bit to realize that I don't control individual characters but "Unions" which are just squads.
One thing I did really appreciate is the great support for gamepads! X360 pad is the default but you can very easily switch it up in the menu to a generic gamepad, which I didn't even need to configure, the buttons matched immediately.
Anyway, I'm already swallowed up in FFXII, so I don't wanna get into any other JRPG else until I'm done with that!