I am going to be relatively short, since in general really can say that the game is thoroughly recommended.
Who does not have Fifa 10 and here turn is interested can access safely.
Who has Fifa 10 and toying with the 11er, the natural question is whether there is another full-price game is really worth. That's not so easy to answer.
Fifa World Cup provides other game modes and focuses on the skills and the World Championships. So the possibilities are far from being as extensive as in Fifa 10. The presentation is good - I like it even better than the 10 because it comes just a little more colorful. The game behavior has changed slightly (it's definitely not as in Fifa 10). So the movements must be planned even a little earlier, the whole works by tactical.
Interesting the possibility to play with your own Virtual Pro (four in a team even) and with the other players to compete for the position of team captain.
EA promises especially during the World Cup regular updates, so you can re-enact the key moments. That sounds promising, but it could not now be assessed.
However, it has so far not managed the nominations of Fifa submitted implement them via update EA. So still play Ballack, eagles and even Rolfes. EDIT: An update has been announced that should the day appear and the squad updated.
Those who enjoy the World Cup and has fallen whom Fifa 10 can access. Who allerings not burning should leave these candidates interested in the World Cup, for those players, it feels more like a full price to update.
I rate the game anyway with 5 stars because it does not change the fact that it is a good, stand-alone product - even if one or the other may annoy Fifa 10 buyers over the pricing policies of EA.