This is a demo I keep coming to again and again, I can't keep myself away from it... its just too damn fun...
The demo alone has me convinced me to buy this game. One thing that I can barely comprehend is the utter scale of the game world... its remarkable... And with the game being focused around the idea of creating "Chaos", it does just that, creates utter chaos. Some of the moments I have experienced in the demo just make me all giddy inside.
Sure I have a feeling the story will completely suck and there won't be any real depth, but this is one of those games where it does not matter. When it comes down to it this game is jam packed with so many features its damn near unbelievable.
When it comes down to it if you haven't played the demo yet, play it now. I can't think of a single reason you shouldn't, unless you hate fun or something.