It is a definite buy if you love football/soccer (although some FIFA fans might disagree).
Personally I think PES is not only the best football/soccer series, but the best overall sports series created to date. There's a reason why this series is very popular in Japan and exremely popular in "Others", especially Europe. Although the Japanese Wii version sales are a bit disappointing in my opinion.
Every goal feels different, the players are stumbling around, scratching the ball from the goal line, throwing themselves in the fireline. Brilliant, unmatched player animations, more suspense in every match than your heart can take. But...er...maybe I'm a little biased...
If you are not familiar with football/soccer games and are interested, you should give it a rent at least.
