For my mind, he is very much in the Tevita Vaikona mold.
He doesn't have blistering pace, but is always ready to do the hard yards up the middle to rest the forwards. As has been mentioned, I think his positional sense for a winger is very good and rarely overuns the ball from the Centre.
Again, one of those people who doesn't always get the plaudits he deserves. It was typical of him to play down his role in the win when interviewed by Sky, rather concentrating on the team performance.