Just played it and here is my feedback, I'm going to be fair and list pros and cons.
Pros: This game feels like Dragon age down to the core. I was very impressed. I love Hawke and the other characters I met during the intro part. Nice touch with the tutorial and varrics imagination made me lol. The combat is much improved and I love how it seamlessly jumps into it now rather than the old "oooh gimme a sec I need to shuffle into position" style combat.
cons: I didn't like how some of the scenes had to break the action and load the transition to a new scene. For example when you kill the ogre in the haha hawkes a badass part, it had to stop the action and load up the small scene of him killing it then it briefley had to stop and load the next bit. They were small pauses in the action but I wish it was more seamless. I understand though if there were some technical limitations. Still it would be nice if there was a way to speed up the scene transitions as it kind of kills the immersion. These bits are more noticable when it cuts back to varric and isabella talking. They get one line in then oops gotta load because it's a new scene.
The other thing I wanna mention is on the PC version I really did end up missing the abilty to zoom out the camera. there were times when I was in combat and wanted to run hawke over to some far off enemies, which I couldn't quite click on because of this.
Overall I rate this demo a 8/10 very good work bioware