I haven't got it due to selling my PS2, but I have played it extensively.
The one thing I hate about getting a new Winning 11/PES games is it always looks worse than the last one...as by the time the new one is out, I've patched the old one up with kits, badges, menu images, banners, balls, gloves, faces, addboards, chants and menu music etc.
But eventually, things progress and I insert this and that, here and there, and the new games slowly starts to resemble something great.
Gameplay wise it's always a step up, even if it does take around a week to feel natural.
However, the one thing I really dislike about WE9 is that the sidestep is mapped to the pad. That just stinks.
On the plus side, it has allowed for the 'blaster' type shot to be included via the R2 button. So that's good.
Can't wait to get it on the PSP.