Well I was able to play the demo, and I enjoyed it for the most part.
Like already mentioned this game is tough, and I had a hard time with it. I had to retry the warg boss like 4 times but that was mostly because I was jumping around like mad while instead you have to hold your ground and just keep smashing him with an occasional dodge or quick time event. So yeah, it doesn't seem like mindless bashing a la Bayonetta or something.
I took me a while to kill off the boss, at least five minutes, and later on the another one showed up, this time as a regular enemy, and I once again took me a while to finally kill it off. I hope this doesn't happen often later on in the game otherwise fighting might became a real chore, especially if you die a lot.
Other then that there's nothing much to say about besides Patrick Stewart's pretty boring and extensive dialogue, - which can be summarized in a couple of sentences - and annoying help messages you can't skip.
edit: I also had a slight problem with the fixed camera angle. It makes it hard to see off-screen enemies which results in cheap hits. But yeah, all of this stuff has been mentioned before.