I'm a keeper and played with the 2006 world cup ball and the euro 2008 official ball, and the they moved like hell laterally(although personally I didn't find that they moved up/down that much, like some previous balls, like the 2002 world cup ball for example), it's nearly impossible to try and catch a ball anymore because you just can't know what the ball's going to do, all these people moaning that the players should stop criticising the ball, should play a game in goal with one of those balls and then talk.