I was a little underwhelmed in the "fun factor" department to be honest.
I am sure having a timer counting down fed into that, combined with being thrown into the game at level 23, not being quite comfortable with all the spell names, meditations, elemental weaknesses, how much to charge, how much charging an attack delays you, etc. It looks cool. I wish you could skip some of the animations of the shadow dragon attacks (think summons animations in FFVII - once you've seen them sometimes you just want to get back to the action). The battle music really wasn't doing it for me either.
Hopefully once I spend a little more time with the demo, get more comfortable with the controls, I'll fall in love with it. I kind of just wish the demo started you at level 1 and allowed you to play up to the first boss battle or something. Well I've only played through the first dungeon so maybe the second dungeon will be fantastic.