From what I see, and from the comments from utd fans he isnt that good, and certainly consistency is an issue.
I think he's one of those players that looks good doing spins and driving forward (He did it once the other day and was praised endlessly but then nothing for the rest of the game), but he isnt of any use unless he is doing that.
Its an interesting phenomena actually with utd. All thier young stars get subjected to this treatment :
Player has 1 or 2 good games. Fans rave about him - he's the future,... the media that cover United endlessly demand that he plays... manager is considered shit for not playing them, player gets upset and tells media, more pressure on the manager who's job becomes impossible. Its all insidiously lovely and a main reason I am glad City havent become that sort of media microscope club like lfc and utd or arsenal.