I read a bit about him. He is very smart and super disciplined. And very effective at what he does. So much so that he stood out even above the other top level

I read a bit about him. He is very smart and super disciplined. And very effective at what he does. So much so that he stood out even above the other top level executives around Jobs at the time. And that's saying something. Jobs was right to pick him. The company has thrived and has weathered many problems that could had badly affected the company under his leadership. He has been one of the company's top assets.