He's been different class. Tracks back well, presses the ball well, direct, pops the ball off quickly under pressure, every pass has a purpose, a great strike and goal threat. He looks the complete player.
My only gripe has been one or two times he's played a square pass instead of picking out Sergio when he was on the shoulder, but hopefully that'll come with time. The one that stood out most was when he beat his man dribbling down the left against West Ham, came inside, and Sergio had made, and held, a run between the fullback and centre half, right on the shoulder into gaping space, waiting. But De Bruyne didn't pick him out, instead he played a square ball to Yaya. Think it came with about twenty minutes to go.
Bit frustrating, as I know David would've picked that one out without hesitation, and Serg would've been one v one with Adrian.
Hopefully that'll come with time though, everything else I've seen has been overwhelmingly positive so far. And to think this lad is just 24.