I liked the demo a lot.
I only played it once though. :T I definitely enjoyed the cinematic action sequences. Kind of gave it a God of War feel and I loved that game so... >.>
The crystarium was a bit better in FF13 though(it was kind of like FFX so I adored it). The only improvement to it in FF13-2 is probably the fact that you aren't so limited anymore
And the fact that you can level up and upgrade your monsters.
Also, the voice acting is so incredible. Noel's VA is just...I have no words. And I'm happy they didn't give Serah an annoying high pitched VA like I was thinking they would. Her VA is actually very suited for her and talented
Except Alyssa...
ALSO CHOCO LINA. LOL. Greatest sales merchant in all FF. I can't even. xD