If you're feeling sad play PES11 because it will make you rofl. Garantueed.
The player movement, the positioning and position play, the speed of ball control, the technical inability to control the ball in many situations, the total lack of acceleration, the bad decision making, the insane AI, the player switching, the lack of indirect free kick taking if not near the opponent's goal, the goalkeepers, the shooting, the unintuitive passing, the hilarious situations, the speed of the ball, the incredibly bad tackling and defending, the awful refereeing, and I'm pretty sure I missed another 20 bad things about this game.
PES11 is the worst football I've ever played over the past 17 or so years.
It simply has nothing to do with football and I doubt it's creators played football themselves. This game is mind blowing.
The only thing that shows some improvement is the passing system which has some interesting sides to it, but is not flawless because in many situations it's become very unintuitive to use. Obviously it was created by someone who made a great analysis of passing in football, but has never touched a ball him/herself in real life.
Overall verdict: do not spend a dime on this game unless someone is holding a gun against your head to make you buy it.
My rating: 1.5/10
The 0.5 for the interesting passing system.