He was a very good player, he's being hugely under-rated here. He was a big player for Bayern Munich when they became European Champions and won a lot of Bundesliga, a top player for England, and Bayern held out for £18m before selling him, which Ferguson agreed to pay. He played an important role in us winning the Premier League and Champions League in a very competitive midfield, putting in excellent performances against Liverpool and Arsenal at Anfield and the Emirates, and against Chelsea in Moscow up against a left back considered the greatest in the world. To say he was 'a bit crap' in his first season or that he is a worse midfielder than O'Shea considering what he achieved in his career before his injury.
In right midfield or central midfield, as of the last time we saw him, he offers defensive stability, energy, he will consistently win the ball, he can run with it to an extent (perversely this is seen as a bad thing) he has pace, strength, and decent, if not exceptional passing ability. MPTutd is right, people seem to be expecting him to be like Xavi.