Well, since I got the link for the demo from this thread, and since I've been lurking here from like forever, I think it's finally time to post at least once.
Trying to explain my impressions in a verbose manner would be too complicated for my poor english, so I'll make a list of positive and negative impressions.
Here we go.
Positive:
Graphics. What else can be said? They're astonishing.
Some animations are much fluider than the 2009 versions, and the brand new are quite good.
The tactics system seems to be improved really much and, as long as I played, it seemed smarter than the previous star-system: Watching Zambrotta doing a defensive overlap (hope that is the right english term :|) was actually satisfactory.
Passing seems improved from pes 2009, like shooting. I have been capable to serve several killer long pass to a running player without sending the ball on another dimension.
AI Seems a little smarter, it's harder to penetrate the box with a single player.
Keepers look like they can actually stop the ball.
Untucked shirts are back, even though I don't really care I red someone cared. So here they are.
I like the new menus, kinda reminds me of the N64 days. I like the music and the star player feature too.
Also, ball seems to actually curve much more on free kicks.
Negative:
Reaction times are horrible. Players have to touch the ball at least 2 times before you can actually pass.
I don't know why, probably it's only my version, but it seems impossible to clear the ball efficiently, while in the previous versions it was sufficient to press the goddamn square button.
Running animation is still there.
Sometimes is impossible to dribble a man: even if you have a huge position advantage and a player with a good balance stat (e.g. Luca Toni), the defender will magically steal the ball.
About the dribble, I don't know if it's a bad thing or a good one. I panicked the first time I attempted to dribble, but if they fix the reaction time it could actually go far better than pes 2009 super fast tempo.
360 movement is there, but it's at least ineffective.
In the end, I can't say I didn't like the game: I really enjoyed it, and still find it funnier than Fifa, but of course it's only my opinion, ready to oblivion
Well, that's all. Please forgive my bad english (again)
P.S. Chants are annoyng, but I don't really care this much about that.