I will try to be objective here, but if I had to chose the footy game after demos I would buy PES 2012.
Yes, it's not perfect in any way, but definitely KONAMI and Seabass team know what have they done wrong all the time. PES 2012 demo is the first PES demo I truely enjoyed. Last time I had such big grin on face playing PES was when I played PES 6! And that says something.
This demo has it's flaws, but I wouldn't count animations into flaws. They are better than ever on Pro Evo. What's more, the player reactions are crisp and smooth. Something I couldn't say for 6 years! No more stupid pause when you turn 90 degree
.
I have few problems though. Shooting feels so light. You may power the bar full and the shot will feel heavily underpowered.
The GK are retards on lower levels of difficulty (Begginer - Professional). They get to do amazing stuff on Top Player and Superstar difficulty though :/. Plus with this AI... Prepare to get heavily raped. AI does some amazing stuff with ball.
Here is a hint though to lessen the struggle a bit
. Learn the new defensive system PES 2012 introduced. It's not worth defending like in older PES titles (ie hold A+X). Learn how to use RT + A to close down one player in one on one and get RT release timing right to make perfect tackle. This has one advantage over double player press, you won't leave gaps in defense.
I will just remind you... AI is superb with killer through balls if they see any gap in your defense.
Can I see anymore flaws? Yes. Passing. It's now assisted/semi assisted, a lot. It's not full manual anymore. Don't get me wrong though, passing in this game is simply a joy to watch. I would just pass the ball around and look how players position to recieve/pass ball further.
Can't wait for full game and a taste of new Football Life Season
EDIT:
Videos from me:
http://www.youtube.com/watch?v=GmF1VKOBld4 part 1
http://www.youtube.com/watch?v=QIvPLnPqqdQ part 2
And
http://www.youtube.com/watch?v=w4QBOEi4K1E one of the best games I had