So yeah. I played it on Xbox round a friends, and I have to say, it played exactly the same as Pro Evo 3, albeit a bit smoother, and they've changed shooting and free-kick taking a bit.

I have and still play Pro Evo 3. Is it worth getting Pro Evo 4 then? With the little bit I played a few nights ago, it didn't seem worth getting to me =/

Pro Evoution 4 is quite easily the best football/soccer game out to date. I strongly recommend that you buy it.
It outstripps the FIFA and This is Football series by far.

It's up to you of course, but there is a noticeable improvement over Pro Evo 3

Does it take a while to notice it?

Because seriously, it felt pretty similar =/

Depends how much of it you play. Every goddamn day? Yeah, you'll notice the changes. Once every few days/weeks/months with mates? Nope.

As mmm said, but the online AI is pretty crap though. You might want to avoid it.

Well, I played a few more games with friends today. Its definately nicer to play. I might wait until the price drops a bit, and maybe pick it up pre-owned when I have a bit of cash to throw around.