His speed, quickness, balance and agility are all at near superstar levels. His decision making is hit or miss (I put that down to age and more so being new). Because his decision making is iffy, he sometimes sees the play late. He's dribbling skills are slightly above average, his speed and the fear that causes makes him look like a better dribbler than he is. But in tight spaces where he can't run past the defender or feign trying to, he isn't as good of a dribbler. His passing is also average, perhaps the weakest part of his game: it's often telegraphed and debiliberately slow in delivery. He doesn't have the natural passing flow of the average City player ( and I'm not talking Silva, Debryune, Yaya or Nasri here) he is somewhere between Delph and Fernando as a passer of the ball.
All that said, his shiftiness, balance, quickness and speed is so devastating that it covers a lot of his warts. I believe as his weaknesses improve, he will become even more deadly. But right now he is probably best against top teams who will play us straight up, and less effective against teams that seat with 8 back.