What Nani did to Bayern Munich, the match where Rooney played with an injury and Rafael got sent off, I have not seen done by any other utd player. In fact I cant recall us ever, before or since, see us completely outplay a top European rival like that. Its a pity that Rafael got that red card Nani was really incredible in that match.
His skill on the ball is superior to Mata, Ozil etc even if his overall play is not.
He was always double marked on the wing and yet was still able to make some of the prem's best defenders look foolish by falling and stumbling over themselves. The problem he had is that he is not a run down the wing and cross it type of player.
Rooney's signature move is to pass the ball over to the right wing then run into to box to connect with an expected cross. Nani did not always provide him with that cross leaving Rooney frustrated and upset. This then led to the fans turning against him and people calling him headless.
However, no-one should ever deny the fact that Nani has incredible ball skills.