He's a poor captain generally. He leads by example more often than not with the bat, and is good in the dressing room in terms of calm leadership, also isn't too bad when they are on top in a test.
When they are on the back-foot however, out in the field he is one of the worst captains in international cricket. Often looks like he doesn't have a clue how to change anything, and seems to shrink away from the responsibility. However it is at times like this with the bat when he is one of the better leaders. Still, tactically he is a fairly poor captain.