The guy is a brilliant bowler, definitely one of the best in the world. He has had his fair share of injuries, suspensions, and bowling action controversies, and as a result he hasn't played as much cricket as he should have over the years. But at the moment I couldn't imagine a more fearsome sight at the bowling crease.
I'd also like to commend his attitude, it's strange how much controversy has surrounded him because IMO he has perhaps the best attitude in the Pakistan team. He is always charging in and giving it everything, even when he's getting hit around, and he's one of the most committed fielders in the team. His catch to get out Clarke was priceless imo, his casual catch technique, Awesome.
But most of all I think he is a wonderful bowler, easily (consistently)the fastest in the world, but also a thinker who bowls brilliantly at the death in ODIs.