He's fantastic with his feet.
Other than that though he's really average. Because the media still measures 'keepers ability on goals conceded and clean sheets, he's always in the conversation for best goalkeeper. Basicly he's being lorded for how good City have been for not allowing the oppo to get any shots off. Now they are starting to struggle in this specific area we are seeing him being as effective as a chocolate fire guard.
He's also terrible when rushing out of his goal to sweep up the ball played behind their defence, to a point of recklessness but think he's been really lucky by not conceding pens and or getting red cards that have happened with others.