Agree with what a few others have said, must be one of the hardest keepers to beat, and one of the most consistant, so in that respect he is world class, but his staying on the line does cause us problems defending set pieces imo.
It's not too bad because he is consistant, so the defenders know it's up to them to clear it, no uncertainty there, however it allows the oppo to play the ball into a more dangerous area than against other teams, where they know the keeper will be collecting anything within range.